SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 10-Q

(MARK ONE)

[X] QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 (d) OF
THE SECURITIES EXCHANGE ACT OF 1934

FOR THE QUARTER ENDED MARCH 31, 2005

OR

[ ] TRANSITION REPORT UNDER SECTION 13 0R 15 (d) OF
THE SECURITIES EXCHANGE ACT OF 1934

FOR THE TRANSITION PERIOD FROM ____________ TO _________
COMMISSION FILE NUMBER: 1-10883

WABASH NATIONAL CORPORATION
( Exact name of registrant as specified in its charter)

          Delaware                                              52-1375208
          --------                                              ----------
  (State of Incorporation)                                    (IRS Employer
                                                          Identification Number)
1000 Sagamore Parkway South,      [WABASH NATIONAL LOGO]

     Lafayette, Indiana                                           47905
     ------------------                                           -----
    (Address of Principal                                       (Zip Code)
     Executive Offices)

Registrant's telephone number, including area code: (765) 771-5300

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of 1934 during the preceding 12 months and has been subject to such filing requirements for the past 90 days.

YES [X] NO [ ]

Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Exchange Act).

YES [X] NO [ ]

The number of shares of common stock outstanding at April 25, 2005 was 31,118,545.

Securities registered pursuant to Section 12(b) of the Act:

Title of each class                         Name of exchange on which registered
----------------------------------------    ------------------------------------
Common stock, $0.01 par value               New York Stock Exchange
Series A Preferred Share Purchase Rights    New York Stock Exchange


WABASH NATIONAL CORPORATION

INDEX

FORM 10-Q

PART I - FINANCIAL INFORMATION                                              Page
                                                                            ----
Item 1.  Financial Statements

         Condensed Consolidated Balance Sheets at
         March 31, 2005 and December 31, 2004                                 3

         Condensed Consolidated Statements of Operations
         For the three months ended March 31, 2005 and 2004                   4

         Condensed Consolidated Statements of Cash Flows
         For the three months ended March 31, 2005 and 2004                   5

         Notes to Condensed Consolidated Financial Statements                 6

Item 2.  Management's Discussion and Analysis of Financial Condition
         and Results of Operations                                            9

Item 3.  Quantitative and Qualitative Disclosures about Market Risk          14

Item 4.  Controls and Procedures                                             14

PART II - OTHER INFORMATION

Item 1.  Legal Proceedings                                                   15

Item 2.  Unregistered Sales of Equity Securities and Use of Proceeds         15

Item 3.  Defaults upon Senior Securities                                     15

Item 4.  Submission of Matters to a Vote of Security Holders                 15

Item 5.  Other Information                                                   15

Item 6.  Exhibits                                                            16

         Signature                                                           16

2

WABASH NATIONAL CORPORATION
CONDENSED CONSOLIDATED BALANCE SHEETS
(in thousands)

                                                                                 March 31,     December 31,
                                                                                   2005            2004
                                                                                 ---------     ------------
                                  ASSETS
CURRENT ASSETS:
  Cash and cash equivalents                                                      $  27,029     $    41,928
  Accounts receivable, net                                                         102,286          87,512
  Current portion of finance contracts                                               1,591           2,185
  Inventories                                                                      137,201          94,600
  Prepaid expenses and other                                                        13,370          16,313
                                                                                 ---------     -----------
    Total current assets                                                           281,477         242,538

PROPERTY, PLANT AND EQUIPMENT, net                                                 121,847         123,626

EQUIPMENT LEASED TO OTHERS, net                                                     12,558          14,030

FINANCE CONTRACTS, net of current portion                                            2,897           3,319

GOODWILL, net                                                                       33,529          33,698

OTHER ASSETS                                                                        18,301          14,835
                                                                                 ---------     -----------
                                                                                 $ 470,609     $   432,046
                                                                                 =========     ===========

                        LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
  Current maturities of long-term debt                                           $   2,000     $     2,000
  Accounts payable                                                                 102,622          78,107
  Other accrued liabilities                                                         47,487          52,442
                                                                                 ---------     -----------
    Total current liabilities                                                      152,109         132,549

LONG-TERM DEBT, net of current maturities                                          125,000         125,500

OTHER NONCURRENT LIABILITIES AND CONTINGENCIES                                       9,159           9,423

STOCKHOLDERS' EQUITY:
  Preferred stock, 300,000 shares authorized, 0 shares issued and outstanding            -               -
  Common stock 75,000,000 shares authorized, $0.01 par value, 31,095,805
    and 30,807,370 shares issued and outstanding, respectively                         313             309
  Additional paid-in capital                                                       328,394         325,512
  Retained deficit                                                                (145,018)       (162,097)
  Accumulated other comprehensive income                                             1,931           2,129
  Treasury stock at cost, 59,600 common shares                                      (1,279)         (1,279)
                                                                                 ---------     -----------
    Total stockholders' equity                                                     184,341         164,574
                                                                                 ---------     -----------
                                                                                 $ 470,609     $   432,046
                                                                                 =========     ===========

See Notes to Condensed Consolidated Financial Statements.

3

WABASH NATIONAL CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
(in thousands, except per share amounts)

(Unaudited)

                                               Three Months Ended
                                                    March 31,
                                             -----------------------
                                                2005         2004
                                             ---------     ---------
NET SALES                                    $ 256,105     $ 221,597

COST OF SALES                                  221,707       198,475
                                             ---------     ---------

  Gross profit                                  34,398        23,122

GENERAL AND ADMINISTRATIVE EXPENSES              9,218        10,473

SELLING EXPENSES                                 3,996         3,775
                                             ---------     ---------
  Income from operations                        21,184         8,874

OTHER INCOME (EXPENSE):
  Interest expense                              (1,618)       (2,897)
  Foreign exchange gains and losses, net          (142)         (140)
  Other, net                                      (792)        1,022
                                             ---------     ---------

  Income before income taxes                    18,632         6,859

INCOME TAX EXPENSE                                 153             -
                                             ---------     ---------

NET INCOME                                   $  18,479     $   6,859
                                             =========     =========
COMMON STOCK DIVIDENDS DECLARED              $   0.045     $       -
                                             =========     =========

BASIC NET INCOME PER SHARE                   $    0.60     $    0.25
                                             =========     =========

DILUTED NET INCOME PER SHARE                 $    0.52     $    0.23
                                             =========     =========

COMPREHENSIVE INCOME
  Net income                                 $  18,479     $   6,859
  Foreign currency translation adjustment         (198)         (229)
                                             ---------     ---------
NET COMPREHENSIVE INCOME                     $  18,281     $   6,630
                                             =========     =========

See Notes to Condensed Consolidated Financial Statements.

4

WABASH NATIONAL CORPORATION
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands)

                                                                                     Three Months Ended
                                                                                         March 31,
                                                                                   ----------------------
                                                                                     2005         2004
                                                                                   --------     ---------
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net income                                                                       $ 18,479         6,859
  Adjustments to reconcile net cash provided by (used in) operating activities:
    Depreciation and amortization                                                     4,243         4,984
    Net (gain) loss on the sale of assets                                               680          (524)
    Provision (credit) for losses on accounts receivable and finance contracts         (179)           45
    Trailer valuation charges                                                            58           164
    Changes in operating assets and liabilities:
     Accounts receivable                                                            (14,595)      (29,118)
     Finance contracts                                                                  918         1,205
     Inventories                                                                    (42,610)       (3,250)
     Prepaid expenses and other                                                        (521)           77
     Accounts payable and accrued liabilities                                        19,100        10,915
     Other, net                                                                         290           254
                                                                                   --------     ---------
      Net cash used in operating activities                                         (14,137)       (8,389)

CASH FLOWS FROM INVESTING ACTIVITIES:
  Capital expenditures                                                               (6,348)       (1,571)
  Proceeds from the sale of property, plant and equipment                             3,528         2,033
                                                                                   --------     ---------
      Net cash (used in) provided by investing activities                            (2,820)          462

CASH FLOWS FROM FINANCING ACTIVITIES:
  Proceeds from exercise of stock options                                             2,558         2,792
  Borrowings under revolving credit facility                                         15,672       143,205
  Payments under revolving credit facility                                          (15,672)     (136,609)
  Payments under long-term debt agreements                                             (500)       (2,195)
                                                                                   --------     ---------
    Net cash provided by financing activities                                         2,058         7,193
                                                                                   --------     ---------

NET DECREASE IN CASH AND CASH EQUIVALENTS                                           (14,899)         (734)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD                                     41,928        12,552
                                                                                   --------     ---------
CASH AND CASH EQUIVALENTS AT END OF PERIOD                                         $ 27,029     $  11,818
                                                                                   ========     =========

See Notes to Condensed Consolidated Financial Statements

5

WABASH NATIONAL CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
(UNAUDITED)

1. GENERAL

The condensed consolidated financial statements of Wabash National Corporation (the Company) have been prepared without audit, pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations. In the opinion of management, the accompanying condensed consolidated financial statements contain all material adjustments (consisting only of normal recurring adjustments) necessary to present fairly the consolidated financial position of the Company, its results of operations and cash flows. The condensed consolidated financial statements included herein should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company's 2004 Annual Report on Form 10-K.

Certain items previously reported in specific condensed consolidated financial statement captions have been reclassified to conform to the 2005 presentation.

2. INVENTORIES

Inventories consisted of the following (in thousands):

                               March 31,    December 31,
                                 2005          2004
                               ---------    ------------
Raw material and components    $  47,295    $     36,146
Work in process                    8,934           4,653
Finished goods                    59,015          35,017
After-market parts                 6,064           6,115
Used trailers                     15,893          12,669
                               ---------    ------------
                               $ 137,201    $     94,600
                               =========    ============

3. NEW ACCOUNTING PRONOUNCEMENTS

Share-Based Payments. In December 2004, the FASB issued SFAS No. 123 (revised 2004), Share-Based Payment. SFAS No. 123R, which is a revision of SFAS No. 123, Accounting for Stock-Based Compensation, superceded APB Opinion No. 25, Accounting for Stock Issued to Employees, and amends SFAS No. 95, Statements of Cash Flows. Statement No. 123R requires that all share-based payments to employees, including grants of employee stock options, to be recognized in the financial statements based upon their fair value. The current pro forma disclosure of the impact on earnings is no longer allowed. The Statement is effective for the fiscal years beginning after June 15, 2005. Based upon currently outstanding options, expense, net of tax, calculated using the Black-Scholes model would amount to approximately $1.1 million in 2006.

4. STOCK-BASED COMPENSATION

The Company follows APB No. 25, Accounting for Stock Issued to Employees, in accounting for its stock options and, accordingly, no compensation cost has been recognized for stock options in the consolidated financial statements. In accordance with SFAS No. 148, Accounting for Stock Based Compensation Transition and Disclosure, the following table illustrates the effect on net income and net

6

income per share as if the Company had applied the fair value recognition provisions of SFAS No. 123, Accounting for Stock Based Compensation to stock-based employee compensation.

                                                                       2005           2004
                                                                     ----------     ----------
  Report net income                                                  $   18,479     $    6,859
  Pro forma stock-based compensation expense (net of tax)                  (868)          (399)
  Stock-based employee compensation expense recorded (net of tax)           218             50
                                                                     ----------     ----------
  Pro forma net income                                               $   17,829     $    6,510
                                                                     ==========     ==========
Basic earnings per share:
  Reported net income per share                                      $     0.60     $     0.25
                                                                     ==========     ==========
  Pro forma net income per share                                     $     0.58     $     0.24
                                                                     ==========     ==========
Diluted earnings per share:
  Reported net income per share                                      $     0.52     $     0.23
                                                                     ==========     ==========
  Pro forma net income per share                                     $     0.50     $     0.22
                                                                     ==========     ==========

5. CONTINGENCIES

A. LITIGATION

Various lawsuits, claims and proceedings have been or may be instituted or asserted against the Company arising in the ordinary course of business, including those pertaining to product liability, labor and health related matters, successor liability, environmental and possible tax assessments. While the amounts claimed could be substantial, the ultimate liability cannot now be determined because of the considerable uncertainties that exist. Therefore, it is possible that results of operations or liquidity in a particular period could be materially affected by certain contingencies. However, based on facts currently available, management believes that the disposition of matters that are currently pending or asserted will not have a material adverse effect on the Company's financial position, liquidity or results of operations.

6. NET INCOME PER SHARE

Per share results have been computed based on the average number of common shares outstanding. The following table presents the number of incremental weighted average shares used in computing diluted per share amounts (in thousands, except per share amounts):

                                                           Three Months Ended March 31,
                                                           ----------------------------
                                                            2005                 2004
                                                           -------              -------
Basic earnings per share:
  Net income applicable to common stockholders             $18,479              $ 6,859
                                                           =======              =======
  Weighted average common shares outstanding                30,914               26,990
                                                           =======              =======
  Basic earnings per share                                 $  0.60              $  0.25
                                                           =======              =======
Diluted earnings per share:
  Net income applicable to common stockholders             $18,479              $ 6,859
  After-tax equivalent of interest on convertible notes      1,210                1,204
                                                           -------              -------
  Diluted net income application to common stockholders    $19,689              $ 8,063
                                                           =======              =======
  Weighted average common shares outstanding                30,914               26,990
  Dilutive stock options                                       508                  985
  Convertible notes equivalent shares                        6,510                6,510
                                                           -------              -------
  Diluted weighted average common shares outstanding        37,932               34,485
                                                           =======              =======
  Diluted earnings per share                               $  0.52              $  0.23
                                                           =======              =======

7

7. SEGMENTS

The Company has two reportable segments: manufacturing and retail and distribution. The manufacturing segment produces and sells new trailers to the retail and distribution segment or to customers who purchase trailers direct or through independent dealers. The retail and distribution segment includes the sale, leasing and financing of new and used trailers, as well as the sale of after-market parts and service through its retail branch network.

Reportable segment information is as follows (in thousands):

  THREE MONTHS ENDED                        Retail and                      Consolidated
    MARCH 31, 2005        Manufacturing    Distribution    Eliminations        Totals
----------------------    -------------    ------------    ------------     ------------
Revenues
    External customers    $     194,072    $     62,033    $         -      $    256,105
    Intersegment sales           37,593               -        (37,593)                -
                          -------------    ------------    -----------      ------------
Total Revenues            $     231,665    $     62,033    $   (37,593)     $    256,105
                          =============    ============    ===========      ============

Income from operations    $      21,841    $        838    $    (1,495)     $     21,184

  THREE MONTHS ENDED
    MARCH 31, 2004
-----------------------------
Revenues
   External customers            $164,055    $ 57,542     $      -     $221,597
   Intersegment sales              24,141           -      (24,141)           -
                                 --------    --------     --------     --------
Total Revenues                   $188,196    $ 57,542     $(24,141)    $221,597
                                 ========    ========     ========     ========

Income (loss) from operations    $ 10,772      (1,915)    $     17     $  8,874

Product Information

The Company offers products primarily in three categories: new trailers, used trailers and parts and service. Other sales include leasing revenues, interest income from finance contracts and freight. The following table sets forth the major product categories and their percentage of total net sales (dollars in thousands):

                          Three Months Ended March 31,
                     --------------------------------------
                            2005                2004
                     ------------------  ------------------
                        $          %        $          %
                     -------    -------  -------    -------
New Trailers         224,737       87.8  191,480       86.4
Used Trailers         12,941        5.1   13,272        6.0
Parts and Service     14,456        5.6   13,387        6.0
Other                  3,971        1.5    3,458        1.6
                     -------    -------  -------    -------
Total Net Sales      256,105      100.0  221,597      100.0
                     =======    =======  =======    =======

8

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This report, including documents incorporated herein by reference, contains forward-looking statements. Additional written or oral forward-looking statements may be made by Wabash from time to time in filings with the Securities and Exchange Commission or otherwise. The words "believe," "expect," "anticipate," and "project" and similar expressions identify forward-looking statements, which speak only as of the date the statement is made. Such forward-looking statements are within the meaning of that term in Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such statements may include, but are not limited to, information regarding revenues, income or loss, capital expenditures, acquisitions, number of retail branch openings, plans for future operations, financing needs or plans, the impact of inflation and plans relating to services of Wabash, as well as assumptions relating to the foregoing. Forward-looking statements are inherently subject to risks and uncertainties, some of which cannot be predicted or quantified. Future events and actual results could differ materially from those set forth in, contemplated by or underlying the forward-looking statements. Statements in this report, including those set forth in "Management's Discussion and Analysis of Financial Condition and Results of Operations," describe factors, among others, that could contribute to or cause such differences.

Although we believe that our expectations that are expressed in these forward-looking statements are reasonable, we cannot promise that our expectations will turn out to be correct. Our actual results could be materially different from and worse than our expectations. Important risks and factors that could cause our actual results to be materially different from our expectations include the factors that are disclosed under the heading "Risk Factors" in our Form 10-K for the year ended December 31, 2004 and elsewhere herein, including, but not limited to, Item 5 of Part II hereof.

RESULTS OF OPERATIONS

The following table sets forth certain operating data as a percentage of net sales for the periods indicated:

                                            Percentage of Net Sales
                                          Three Months Ended March 31,
                                          ----------------------------
                                           2005                  2004
                                          -----                 ------
Net sales                                 100.0%                100.0%
Cost of sales                              86.6                  89.6
                                          -----                 -----
     Gross profit                          13.4                  10.4

General and administrative expense          3.5                   4.7
Selling expense                             1.6                   1.7
                                          -----                 -----
     Income from operations                 8.3                   4.0

Interest expense                           (0.6)                 (1.3)
Foreign exchange gains and losses, net     (0.1)                 (0.1)
Other, net                                 (0.3)                  0.5
                                          -----                 -----
     Income before income taxes             7.3                   3.1

Income tax expense                          0.1                     -
                                          -----                 -----
     Net income                             7.2%                  3.1%
                                          =====                 =====

9

The industry recovery that began in 2003 continues and it is expected to accelerate over the balance of 2005 as production of trailers is anticipated to increase from approximately 229,000 units in 2004 to approximately 271,000 units in 2005 according to ACT Research Company, LLC estimates. The expansion in production is predicated on a number of factors including improving general economic conditions and pent-up trucking industry demand for replacement units as the average age of trailer fleets increases. To date, Department of Transportation regulations regarding driver hours (hours of service), which went into effect on January 1, 2004, have had no discernible impact on our business.

We expect to participate in the industry growth because our core customers are among the largest participants in the trucking industry, our DuraPlate(R) trailer continues to have increased market acceptance and penetration and we are expanding our presence into the middle market carriers - approximately 1,250 carriers with fleet sizes ranging from 250 to 7,500 units.

We believe that Wabash is well positioned to benefit from any increased demand for trailers because of the improvements that have been made over the last three years. As a result of our continuous improvement initiatives, we have reduced our total cost of producing a trailer and effectively increased production capacity. In 2004, we experienced significant price volatility in our principal raw materials, steel and timber, and we expect this trend of rising material prices will continue in the near term.

THREE MONTHS ENDED MARCH 31, 2005

NET SALES

Net sales increased $34.5 million compared to the first quarter of 2004. By business segment, net external sales and related units sold were as follows (dollars in millions):

                                  Three Months Ended March 31,
                                -------------------------------
                                  2005       2004      % Change
                                --------    ------     --------
Sales by Segment:                        (in millions)
     Manufacturing              $  194.1    $164.1         18%
     Retail and Distribution        62.0      57.5          8%
                                --------    ------
Total                           $  256.1    $221.6         16%
                                ========    ======

New trailer units:                          (units)
     Manufacturing                 9,700     9,700          -
     Retail and Distribution       1,500     1,500          -
                                --------    ------
Total                             11,200    11,200          -
                                ========    ======
Used trailer units                 1,300     2,000        (35%)
                                ========    ======

Manufacturing sales increased due to higher average selling prices per unit, as unit volume was unchanged from the prior period. The increase in selling prices results from aggressively passing through increases in raw material costs and a favorable customer mix. Sales to core accounts represented less than 20% of sales in the first quarter of 2005 compared to over 35% in the prior year period.

First quarter 2005 sales in the retail and distribution segment were up $4.5 million compared to the prior year period primarily as a result of higher average selling price for new trailers as unit volume was constant. The average selling price increase reflects the pass through of significant raw materials increases experienced since the first quarter of 2004. A modest decrease in used trailer sales was more than offset by increased parts and service sales despite having three fewer full-service branches.

10

GROSS PROFIT

Gross profit as a percent of sales was 13.4% for the quarter compared to 10.4% for the same period in 2004. As discussed below, both of our segments contributed as follows (in millions):

                              Three Months Ended March 31,
                              ---------------------------
                               2005     2004     % Change
                              -----     -----    --------
Gross Profit by Segment:
   Manufacturing              $30.9     $20.1       54%
   Retail and Distribution      5.0       3.0       67%
   Eliminations                (1.5)        -        -
                              -----     -----

Total Gross Profit            $34.4     $23.1       49%
                              =====     =====

The manufacturing segment's gross profit as a percentage of sales was 15.9% in 2005, a 3.7 percentage point improvement from the prior year period as a result of the selling price increases noted above.

The retail and distribution segment's gross profit as a percent of sales was 8.0% compared to 5.1% in the 2004 quarter. The increase is primarily due to improved new trailer margins as market conditions allows price increases to out pace cost increases. Service margins were up for the quarter primarily due to the positive impact of continuous improvement initiatives resulting in improved overhead efficiencies. Used trailer and parts margins were down slightly in the 2005 period.

GENERAL AND ADMINISTRATIVE EXPENSES

General and administrative expenses decreased $1.3 million in the first quarter of 2005 to $9.2 million from $10.5 million in the prior year period primarily due to reductions in outside professional fees and compensation costs.

SELLING EXPENSE

Selling expense increased $0.2 million to $4.0 million in the first quarter of 2005, compared to $3.8 million in the prior year period.

OTHER INCOME (EXPENSE)

Interest expense totaled $1.6 million for the quarter ended March 31, 2005, a decrease of $1.3 million from the prior year period primarily due to reduced average borrowings.

Other, net for the three months ended March 31, 2005 was an expense of $0.8 million compared to income of $1.0 million in the 2004 period. The 2005 expense related to the disposition of non-operating assets. The 2004 income included gains on the sale of closed properties.

INCOME TAXES

We recognized income tax expense of $0.2 million primarily related to Federal and State alternative minimum tax (AMT) in the first quarter of 2005. The income tax expense is below statutory tax rates primarily due to the utilization of net operating loss (NOL) carryforwards. Because of uncertainty related to the realizability of NOLs in excess of those utilized, a full valuation allowance continues to be recorded against the related deferred tax assets at March 31, 2005.

11

LIQUIDITY AND CAPITAL RESOURCES

CAPITAL STRUCTURE

Today, our capital structure is comprised of a mix of equity and debt. Our objective is to generate operating cash flows sufficient to satisfy normal requirements for working capital and capital expenditures and be positioned to take advantage of market opportunities.

CASH FLOW

Cash used in operating activities amounted to $14.1 million, an increase of $5.7 million from the prior year period as increases in working capital were only partially offset by an $11.8 million increase in net income (adjusted for non-cash items) as follows:

- Accounts receivables increased $14.6 million compared to $29.1 million in the first quarter of 2004. Days sales outstanding, a measure of working capital efficiency that measures the amount of time a receivable is outstanding, was 37 days at March 31, 2005, a decrease of 3 days versus the prior year.

- Inventory increased $42.6 million compared to $3.3 in the prior year period. Inventory turns, a commonly used measure of working capital efficiency that measures how quickly inventory turns, decreased to approximately 6.5 times versus 9 times in the prior year reflecting an increase in raw materials and finished goods inventories. The inventory increases are primarily due to production requirements and price increases.

- Accounts payable and accrued liabilities increased approximately $19.1 million in line with increases in raw materials and finished goods inventories.

Investing activities used $2.8 million in the 2005 quarter, a change of $3.3 million from the prior year period resulting primarily from increased capital spending.

Financing activities provided $2.1 million during the period, a decrease of $5.1 million from the prior year period primarily due to reduced net borrowing under our revolving credit facility.

Capital Expenditures

Capital spending amounted to approximately $6.3 million for the first three months of 2005 and is anticipated to be in the range of $25-35 million for 2005. Spending thus far in 2005 included $3.9 million related to our ERP project.

Outlook

The industry recovery that began in 2003 is expected to continue into 2005 and beyond. ACT estimates that production of trailers in 2005 will be approximately 271,000 units. The continued expansion in production is predicated on a number of factors including improving general economic conditions and pent-up trucking industry demand for replacement units as the average age of trailer fleets increases.

We expect to participate in the industry growth because (1) our core customers are among the dominant participants in the trucking industry, (2) our DuraPlate(R) trailer continues to have increased market acceptance, (3) our focus on developing solutions that reduce our customers trailers maintenance costs, and (4) the success we are achieving expanding our presence into the middle market carriers - approximately 1,250 carriers with fleet sizes ranging from 250 to 7,500 units that represent a fleet that

12

totals approximately one million trailers. In the first quarter of 2005, we added approximately 23 new customers representing orders of approximately 1,500 units from this segment of the market.

We believe that Wabash is well positioned to benefit from an increased demand for trailers because of the improvements that have been made over the last three years. As a result of our continuous improvement initiatives, we have reduced the cost of producing a trailer and effectively increased production capacity.

As of March 31, 2005, our liquidity position, defined as cash on hand and available borrowing capacity, amounted to approximately $145.5 million and total debt and lease obligations amounted to approximately $131.5 million (including $4.5 million of operating lease commitments). We expect that in 2005, we will be able to generate sufficient cash flow from operations to fund working capital and capital expenditure requirements.

CONTRACTUAL OBLIGATIONS AND COMMERCIAL COMMITMENTS

We have included a summary of our Contractual Obligations and Commercial Commitments in our annual report on Form 10-K for the year ended December 31, 2004, filed on March 3, 2005. There have been no material changes to the summary provided in that report.

OFF-BALANCE SHEET TRANSACTIONS

As of March 31, 2005, we had approximately $4.5 million in operating lease commitments. We did not enter into any material off-balance sheet debt or operating lease transactions during the quarter.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

We have included a summary of our Critical Accounting Estimates in our annual report on Form 10-K for the year ended December 31, 2004, filed on March 3, 2005. There have been no material changes to the summary provided in that report.

BACKLOG

Orders that have been confirmed by the customer in writing and can be produced during the next 18 months are included in backlog. Orders that comprise the backlog may be subject to changes in quantities, delivery, specifications and terms. Our backlog of orders was approximately $500 million at March 31, 2005 compared to $280 million at December 31, 2004. We expect to complete the majority of our existing backlog orders within the next twelve months.

CUSTOMER CREDIT RISK

We sublease certain highly specialized RoadRailer(R) equipment to Grupo Transportation Marititma Mexicana SA (TMM), who is experiencing financial difficulties. In August 2004, TMM completed the restructuring of its debt agreements and has sold certain assets. Customer payments, which have historically been timely, are behind schedule. The customer owes us $6.9 million secured by highly specialized RoadRailer(R) equipment, which due to the nature of the equipment, has a minimal recovery value.

13

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISKS

In addition to the risks inherent in its operations, the Company has exposure to financial and market risk resulting from volatility in commodity prices, interest rates and foreign exchange rates. The following discussion provides additional detail regarding the Company's exposure to these risks.

a. COMMODITY PRICE RISKS

The Company is exposed to fluctuation in commodity prices through the purchase of raw materials that are processed from commodities such as aluminum, steel, wood and virgin plastic pellets. Given the historical volatility of certain commodity prices, this exposure can significantly impact product costs. The Company may manage aluminum price changes by entering into fixed price contracts with its suppliers. As of March 31, 2005, the Company had outstanding purchase commitments of approximately $25.5 million through December 2005 for materials that will be used in the production process. Because the Company typically does not set prices for its products more than 45-90 days in advance of its commodity purchases, it can take into account the cost of the commodity in setting its prices for each order. To the extent that the Company is unable to offset the increased commodity costs in its product prices, the Company's results would be materially and adversely affected.

b. INTEREST RATES

As of March 31, 2005, the Company had no floating rate debt outstanding under its various financing agreements.

c. FOREIGN EXCHANGE RATES

The Company is subject to fluctuations in the Canadian dollar exchange rate that impact intercompany transactions between the Company and its Canadian subsidiary, as well as U.S. denominated transactions between the Canadian subsidiaries and unrelated parties. A five cent change in the Canadian exchange rate would result in an approximately $1.0 million impact on results of operations. The Company does not hold or issue derivative financial instruments for speculative purposes.

ITEM 4. CONTROLS AND PROCEDURES

DISCLOSURE CONTROLS AND PROCEDURES

Based on an evaluation under the supervision and with the participation of the Company's management, the Company's principal executive officer and principal financial officer have concluded that the Company's disclosure controls and procedures (as defined in Rules 14a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (Exchange Act)) were effective as of March 31, 2005.

CHANGES IN INTERNAL CONTROLS

There were no changes in the Company's internal control over financial reporting, as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act, during the first quarter of fiscal 2005 that have materially affected or are reasonably likely to materially affect the Company's internal control over financial reporting.

14

PART II - OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

There have been no material changes in legal proceedings from the items disclosed in the Company's Annual Report on Form 10-K filed with the Securities and Exchange Commission.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Not Applicable

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

Not Applicable

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

Not Applicable

ITEM 5. OTHER INFORMATION

RISK FACTORS

You should carefully consider the risks described in our Form 10-K for the year ended December 31, 2004, including those under the heading "Risk Factors" appearing in Item 7B of Part II of the Form 10-K, in addition to risk factors discussed below and other information contained or incorporated by reference in this Report before investing in our securities. Realization of any of the following risks could have a material adverse effect on our business, financial condition, cash flows and results of operations.

WE ARE IN THE INITIAL STAGES OF A PROJECT TO IMPLEMENT A COMPANY-WIDE ENTERPRISE RESOURCE PLANNING (ERP) SYSTEM, AND IF OUR IMPLEMENTATION IS UNSUCCESSFUL OR PROVES MORE COSTLY THAN EXPECTED OUR BUSINESS COULD BE HARMED.

The project to implement a new ERP system is in its initial stages. Our new ERP system is expected to integrate departments and functions across the Company, enhance the ability to service customers and improve our control environment. We may encounter delays and unforeseen costs in this process. If we are unable to implement the ERP system successfully, we may not be able to properly serve our customers or realize expected efficiencies.

WE MAY NOT BE SUCCESSFUL IN OUR PLANS TO UPGRADE OUR PRODUCTION LINES AND REALIZE INCREASED LEVELS OF EFFICIENCY.

In 2005, we began the first phase of what is planned to be a four-phase three-year project to replace four trailer assembly lines using technology adapted from the automotive industry at a cost of approximately $10 million per line. Our costs to replace the lines could exceed our estimates, the technology may not work as planned and we may not be able to meet our estimated timeline. Even if we are successful in replacing the production lines, we may not realize the level of costs savings that we estimate.

15

ITEM 6. EXHIBITS

(a) Exhibits:

10.26 Restricted Stock Unit Agreement between the Company and William P. Greubel dated March 7, 2005 (Incorporated by reference to the Company's Form 8-K filed on March 11, 2005).

10.27 Stock Option Agreement between the Company and William P. Greubel dated March 7, 2005 (Incorporated by reference to the Company's Form 8-K filed on March 11, 2005).

10.28 Corporate Plan for Retirement - Executive Plan

31.01 Certification of Principal Executive Officer

31.02 Certification of Principal Financial Officer

32.01 Written Statement of Chief Executive Officer and Chief Financial Officer Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (18 U.S.C. Section 1350).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

WABASH NATIONAL CORPORATION

Date: April 29, 2005     By: /s/ Robert J. Smith
                             -------------------------------------------------
                             Robert J. Smith
                             Senior Vice President and Chief Financial Officer
                             (Principal Financial Officer)

16

EXHIBIT 10.28

THE CORPORATEPLAN FOR RETIREMENT(SM)
EXECUTIVE PLAN

BASIC PLAN DOCUMENT

IMPORTANT NOTE

THIS DOCUMENT HAS NOT BEEN APPROVED BY THE DEPARTMENT OF LABOR, THE INTERNAL REVENUE SERVICE OR ANY OTHER GOVERNMENTAL ENTITY. AN ADOPTING EMPLOYER MUST DETERMINE WHETHER THE PLAN IS SUBJECT TO THE FEDERAL SECURITIES LAWS AND THE SECURITIES LAWS OF THE VARIOUS STATES. AN ADOPTING EMPLOYER MAY NOT RELY ON THIS DOCUMENT TO ENSURE ANY PARTICULAR TAX CONSEQUENCES OR TO ENSURE THAT THE PLAN IS "UNFUNDED AND MAINTAINED PRIMARILY FOR THE PURPOSE OF PROVIDING DEFERRED COMPENSATION TO A SELECT GROUP OF MANAGEMENT OR HIGHLY COMPENSATED EMPLOYEES" UNDER THE EMPLOYEE RETIREMENT INCOME SECURITY ACT WITH RESPECT TO THE EMPLOYER'S PARTICULAR SITUATION. FIDELITY MANAGEMENT TRUST COMPANY, ITS AFFILIATES AND EMPLOYEES CANNOT PROVIDE YOU WITH LEGAL ADVICE IN CONNECTION WITH THE EXECUTION OF THIS DOCUMENT. THIS DOCUMENT SHOULD BE REVIEWED BY THE EMPLOYER'S ATTORNEY PRIOR TO EXECUTION.


CORPORATEPLAN FOR EXECUTIVE
BASIC PLAN DOCUMENT

ARTICLE 1
ADOPTION AGREEMENT

ARTICLE 2
DEFINITIONS

2.01 - Definitions

ARTICLE 3
PARTICIPATION

3.01 - Date of Participation
3.02 - Resumption of Participation Following Re employment
3.03 - Cessation or Resumption of Participation Following a Change in Status

ARTICLE 4
CONTRIBUTIONS

4.01 - Deferral Contributions
4.02 - Matching Contributions
4.03 - Employer Contributions
4.04 - Time of Making Contributions

ARTICLE 5

PARTICIPANTS' ACCOUNTS

5.01 - Individual Accounts

ARTICLE 6
INVESTMENT OF CONTRIBUTIONS

6.01 - Manner of Investment
6.02 - Investment Decisions

ARTICLE 7
RIGHT TO BENEFITS

7.01 - Normal or Early Retirement
7.02 - Death
7.03 - Other Termination of Employment
7.04 - Separate Account
7.05 - Forfeitures
7.06 - Adjustment for Investment Experience
7.07 - Unforeseeable Emergency Withdrawals
7.08 - Change in Control

ARTICLE 8
DISTRIBUTION OF BENEFITS PAYABLE AFTER TERMINATION OF SERVICE

8.01 - Distribution of Benefits to Participants and Beneficiaries
8.02 - Determination of Method of Distribution
8.03 - Notice to Trustee
8.04 - Time of Distribution

ARTICLE 9

2

AMENDMENT AND TERMINATION

9.01 - Amendment by Employer
9.02 - Retroactive Amendments
9.03 - Termination
9.04 - Distribution Upon Termination of the Plan

ARTICLE 10
MISCELLANEOUS

10.01 - Communication to Participants
10.02 - Limitation of Rights
10.03 - Nonalienability of Benefits
10.04 - Facility of Payment
10.05 - Information between Employer and Trustee
10.06 - Notices
10.07 - Governing Law

ARTICLE 11
PLAN ADMINISTRATION

11.01 - Powers and responsibilities of the Administrator

11.02 - Nondiscriminatory Exercise of Authority

11.03 - Claims and Review Procedures

3

PREAMBLE

IT IS THE INTENTION OF THE EMPLOYER TO ESTABLISH HEREIN AN UNFUNDED PLAN MAINTAINED SOLELY FOR THE PURPOSE OF PROVIDING DEFERRED COMPENSATION FOR A SELECT GROUP OF MANAGEMENT OR HIGHLY COMPENSATED EMPLOYEES AS PROVIDED IN ERISA.

ARTICLE 1. ADOPTION AGREEMENT.

ARTICLE 2. DEFINITIONS.

2.01. DEFINITIONS.

(a)Wherever used herein, the following terms have the meanings set forth below, unless a different meaning is clearly required by the context:

(1) "Account" means an account established on the books of the Employer for the purpose of recording amounts credited on behalf of a Participant and any income, expenses, gains or losses included thereon.

(2) "Administrator" means the Employer adopting this Plan, or other person designated by the Employer in Section 1.01(b).

(3) "Adoption Agreement" means Article 1, under which the Employer establishes and adopts or amends the Plan and designates the optional provisions selected by the Employer. The provisions of the Adoption Agreement shall be an integral part of the Plan.

(4) "Beneficiary" means the person or persons entitled under Section 7.02 to receive benefits under the Plan upon the death of a Participant.

(5) "Code" means the Internal Revenue Code of 1986, as amended from time to time.

(6) "Compensation" means for purposes of Article 4 (Contributions) wages as defined in Section 3401(a) of the Code and all other payments of compensation to an employee by the Employer (in the course of the Employer's trade or business) for which the Employer is required to furnish the employee a written statement under Section 6041(d) and 6051(a)(3) of the Code, excluding any items elected by the Employer in
Section 1.04, reimbursements or other expense allowances, fringe benefits (cash and non-cash), moving expenses, deferred compensation and welfare benefits, but including amounts that are not includable in the gross income of the Participant under a salary reduction agreement by reason of the application of Sections 125, 132(f)(4), 402(e)(3), 402(h) or 403(b) of the Code. Compensation shall be determined without regard to any rules under Section 3401(a) of the Code that limit the remuneration included in wages based on the nature or location of the employment or the services performed (such as the exception for agricultural labor in Section 3401(a)(2) of the Code).

Compensation shall also include amounts deferred pursuant to an election under Section 4.01.

In the case of any Self-Employed Individual or an Owner-Employee, Compensation means the Self-Employed Individual's Earned Income.

(7) "Earned Income" means the net earnings of a Self-Employed Individual derived from the trade or business with respect to which the Plan is established and for which the personal services of such individual are a material income-providing factor, excluding any items not included in gross income and the deductions allocated to such items, except that for taxable years beginning after December 31, 1989 net earnings shall be determined with regard to the deduction allowed under Section 164(f) of the Code, to the extent applicable to the Employer. Net earnings shall be reduced by contributions of the Employer to any qualified plan, to the extent a deduction is allowed to the Employer for such contributions under Section 404 of the Code.


(8) "Employee" means any employee of the Employer, Self-Employed Individual or Owner-Employee.

(9) "Employer" means the employer named in Section 1.02(a) and any Related Employers designated in Section 1.02(b).

(10) "Employment Commencement Date" means the date on which the Employee first performs an Hour of Service.

(11) "Entry Date" means the date(s) designated in Section 1.03(b).

(12) "ERISA" means the Employee Retirement Income Security Act of 1974, as from time to time amended.

(13) "Fund Share" means the share, unit, or other evidence of ownership in a Permissible Investment.

(14) "Hour of Service" means, with respect to any Employee,

(A) Each hour for which the Employee is directly or indirectly paid, or entitled to payment, for the performance of duties for the Employer or a Related Employer, each such hour to be credited to the Employee for the computation period in which the duties were performed;

(B) Each hour for which the Employee is directly or indirectly paid, or entitled to payment, by the Employer or Related Employer (including payments made or due from a trust fund or insurer to which the Employer contributes or pays premiums) on account of a period of time during which no duties are performed (irrespective of whether the employment relationship has terminated) due to vacation, holiday, illness, incapacity, disability, layoff, jury duty, military duty, or leave of absence, each such hour to be credited to the Employee for the Eligibility Computation Period in which such period of time occurs, subject to the following rules:

(i) No more than 501 Hours of Service shall be credited under this paragraph (B) on account of any single continuous period during which the Employee performs no duties;

(ii) Hours of Service shall not be credited under this paragraph (B) for a payment which solely reimburses the Employee for medically-related expenses, or which is made or due under a plan maintained solely for the purpose of complying with applicable workmen's compensation, unemployment compensation or disability insurance laws; and

(iii) If the period during which the Employee performs no duties falls within two or more computation periods and if the payment made on account of such period is not calculated on the basis of units of time, the Hours of Service credited with respect to such period shall be allocated between not more than the first two such computation periods on any reasonable basis consistently applied with respect to similarly situated Employees; and

(C) Each hour not counted under paragraph (A) or (B) for which back pay, irrespective of mitigation of damages, has been either awarded or agreed to be paid by the Employer or a Related Employer, each such hour to be credited to the Employee for the computation period to which the award or agreement pertains rather than the computation period in which the award agreement or payment is made.

For purposes of determining Hours of Service, Employees of the Employer and of all Related Employers will be treated as employed by a single employer. For purposes of paragraphs (B) and (C) above, Hours of Service will be calculated in accordance with the provisions of Section 2530.200b-2(b) of the Department of Labor regulations, which are incorporated herein by reference.

Solely for purposes of determining whether a break in service for participation purposes has occurred in a computation period, an individual who is absent from work for maternity or paternity reasons shall receive credit for the hours of service which would otherwise been credited to such individual but for such absence, or in any case in which such hours cannot be determined, 8 hours of service per day of such absence. For purposes of this paragraph, an absence from work for maternity reasons means an absence (1) by reason of the pregnancy of the individual, (2) by reason of a birth of a child of the individual, (3) by reason of the placement of a child with the individual in connection with


the adoption of such child by such individual, or (4) for purposes of caring for such child for a period beginning immediately following such birth or placement. The hours of service credited under this paragraph shall be credited (1) in the computation period in which the absence begins if the crediting is necessary to prevent a break in service in that period, or (2) in all other cases, in the following computation period.

(15) "Normal Retirement Age" means the normal retirement age specified in Section 1.07(f) of the Adoption Agreement.

(16) "Owner-Employee" means, if the Employer is a sole proprietorship, the individual who is the sole proprietor, or, if the Employer is a partnership, a partner who owns more than 10 percent of either the capital interest or the profits interest of the partnership.

(17) "Participant" means any Employee who participates in the Plan in accordance with Article 3 hereof.

(18) "Permissible Investment" means the investments specified by the Employer as available for investment of assets of the Trust and agreed to by the Trustee. The Permissible Investments under the Plan shall be listed in the Service Agreement.

(19) "Plan" means the plan established by the Employer as set forth herein as a new plan or as an amendment to an existing plan, by executing the Adoption Agreement, together with any and all amendments hereto.

(20) "Plan Year" means the 12-consecutive-month period designated by the Employer in Section 1.01(c).

(21) "Related Employer" means any employer other than the Employer named in Section 1.02(a), if the Employer and such other employer are members of a controlled group of corporations (as defined in Section 414(b) of the Code) or an affiliated service group (as defined in
Section 414(m)), or are trades or businesses (whether or not incorporated) which are under common control (as defined in Section
414(c)), or such other employer is required to be aggregated with the Employer pursuant to regulations issued under Section 414(o).

(22) "Self-Employed Individual" means an individual who has Earned Income for the taxable year from the Employer or who would have had Earned Income but for the fact that the trade or business had no net profits for the taxable year.

(23) "Service Agreement" means the agreement between the Employer and Trustee regarding the arrangement between the parties for recordkeeping services with respect to the Plan.

(24) "Trust" means the trust created by the Employer.

(25) "Trust Agreement" means the agreement between the Employer and the Trustee, as set forth in a separate agreement, under which assets are held, administered, and managed subject to the claims of the Employer's creditors in the event of the Employer's insolvency, until paid to Plan Participants and their Beneficiaries as specified in the Plan.

(26) "Trust Fund" means the property held in the Trust by the Trustee.

(27) "Trustee" means the corporation or individual(s) appointed by the Employer to administer the Trust in accordance with the Trust Agreement.

(28) "Years of Service for Vesting" means, with respect to any Employee, the number of whole years of his periods of service with the Employer or a Related Employer (the elapsed time method to compute vesting service), subject to any exclusions elected by the Employer in
Section 1.07(c). An Employee will receive credit for the aggregate of all time period(s) commencing with the Employee's Employment Commencement Date and ending on the date a break in service begins, unless any such years are excluded by Section 1.07(c). An Employee will also receive credit for any period of severance of less than 12 consecutive months. Fractional periods of a year will be expressed in terms of days.

In the case of a Participant who has 5 consecutive 1-year breaks in service, all years of service after such breaks in service will be disregarded for the purpose of vesting the Employer-derived account balance that


accrued before such breaks, but both pre-break and post-break service will count for the purposes of vesting the Employer-derived account balance that accrues after such breaks. Both accounts will share in the earnings and losses of the fund.

In the case of a Participant who does not have 5 consecutive 1-year breaks in service, both the pre-break and post-break service will count in vesting both the pre-break and post-break employer-derived account balance.

A break in service is a period of severance of at least 12 consecutive months. Period of severance is a continuous period of time during which the Employee is not employed by the Employer. Such period begins on the date the Employee retires, quits or is discharged, or if earlier, the 12-month anniversary of the date on which the Employee was otherwise first absent from service.

In the case of an individual who is absent from work for maternity or paternity reasons, the 12-consecutive month period beginning on the first anniversary of the first date of such absence shall not constitute a break in service. For purposes of this paragraph, an absence from work for maternity or paternity reasons means an absence
(1) by reason of the pregnancy of the individual, (2) by reason of the birth of a child of the individual, (3) by reason of the placement of a child with the individual in connection with the adoption of such child by such individual, or (4) for purposes of caring for such child for a period beginning immediately following such birth or placement.

If the Plan maintained by the Employer is the plan of a predecessor employer, an Employee's Years of Service for Vesting shall include years of service with such predecessor employer. In any case in which the Plan maintained by the Employer is not the plan maintained by a predecessor employer, service for such predecessor shall be treated as service for the Employer to the extent provided in Section 1.08.

(b) Pronouns used in the Plan are in the masculine gender but include the feminine gender unless the context clearly indicates otherwise.

ARTICLE 3. PARTICIPATION.

3.01. DATE OF PARTICIPATION. An eligible Employee (as set forth in Section 1.03(a)) who has filed an election pursuant to Section 4.01 will become a Participant in the Plan on the first Entry Date coincident with or following the date on which such election would otherwise become effective, as determined under Section4.01.

3.02. RESUMPTION OF PARTICIPATION FOLLOWING REEMPLOYMENT. If a Participant ceases to be an Employee and thereafter returns to the employ of the Employer he will again become a Participant as of an Entry Date following the date on which he completes an Hour of Service for the Employer following his re employment, if he is an eligible Employee as defined in Section 1.03(a), and has filed an election pursuant to Section 4.01.

3.03. CESSATION OR RESUMPTION OF PARTICIPATION FOLLOWING A CHANGE IN STATUS. If any Participant continues in the employ of the Employer or Related Employer but ceases to be an eligible Employee as defined in Section 1.03(a), the individual shall continue to be a Participant until the entire amount of his benefit is distributed; however, the individual shall not be entitled to make Deferral Contributions or receive an allocation of Matching contributions during the period that he is not an eligible Employee. Such Participant shall continue to receive credit for service completed during the period for purposes of determining his vested interest in his Accounts. In the event that the individual subsequently again becomes an eligible Employee, the individual shall resume full participation in accordance with Section 3.01.

ARTICLE 4. CONTRIBUTIONS.

4.01. DEFERRAL CONTRIBUTIONS. Each Participant may elect to execute a salary reduction agreement with the Employer to reduce his Compensation by a specified percentage, not exceeding the percentage set forth in Section 1.05(a) and equal to a whole number multiple of one (1) percent, per payroll period, subject to any election regarding bonuses, as set out in Subsection 1.05(a)(2). Such agreement shall become effective on the first day of the period as set forth in the Participant's election. The election will be effective to defer Compensation relating to all services performed in a calendar year subsequent to the filing of such an election, subject to any election regarding bonuses, as set out in Subsection 1.05(a)(2). An election once made will remain in effect until a new election is made, provided, however that such an election choosing a distribution date pursuant to 1.06(b)(1)(B) will become ineffective the first day of the calendar year preceding the calendar year in which the election requires the distribution to be made. A new election


will be effective as of the first day of the following calendar year and will apply only to Compensation payable with respect to services rendered after such date. Amounts credited to a Participant's account prior to the effective date of any new election will not be affected and will be paid in accordance with that prior election. The Employer shall credit an amount to the account maintained on behalf of the Participant corresponding to the amount of said reduction. Under no circumstances may a salary reduction agreement be adopted retroactively. A Participant may revoke a salary reduction agreement for a calendar year during that year, provided, however, that such revocation shall apply only to Compensation not yet earned. In that event, the Participant shall be precluded from electing to defer future Compensation hereunder during the calendar year to which the revocation applies. Notwithstanding the above,

(a) in the calendar year in which the Plan first becomes effective or in the year in which the Participant first becomes eligible to participate, an election to defer compensation may be made within 30 days after the Participant is first eligible or the Plan is first effective, which election shall be effective with respect to Compensation payable with respect to services rendered after the date of the election; and

(b) in the event the Employer has elected to permit the deferral of bonus payments hereunder, a salary reduction agreement applicable to such bonus deferral must be made in the calendar year immediately preceding the calendar year to which the bonus relates.

4.02. MATCHING CONTRIBUTIONS. If so provided by the Employer in Section 1.05(b), the Employer shall make a "Matching Contribution" to be credited to the account maintained on behalf of each Participant who had "Deferral Contributions" pursuant to Section 4.01 made on his behalf during the year and who meets the requirement, if any, of Section 1.05(b)(3). The amount of the "Matching Contribution" shall be determined in accordance with Section 1.05(b).

4.03. EMPLOYER CONTRIBUTIONS. If so provided by the Employer in Section 1.05(c)(1), the Employer shall make an "Employer Contribution" to be credited to the account maintained on behalf of each Participant who meets the requirement, if any, of Section 1.05(c)(3) in the amount required by Section 1.05(c)(1). If so provided by the Employer in Section 1.05(c)(2), the Employer may make an "Employer Contribution" to be credited to the account maintained on behalf of any Participant in such an amount as the Employer, in its sole discretion, shall determine. In making "Employer Contributions" pursuant to Section 1.05(c)(2), the Employer shall not be required to treat all Participants in the same manner in determining such contributions and may determine the "Employer Contribution" of any Participant to be zero.

4.04. TIME OF MAKING CONTRIBUTIONS. The Employer shall remit contributions deemed made hereunder to the Trust as soon as practicable after such contributions are deemed made under the terms of the Plan.

ARTICLE 5. PARTICIPANTS' ACCOUNTS.

5.01. INDIVIDUAL ACCOUNTS. The Administrator will establish and maintain an Account for each Participant, which will reflect Matching and Deferral Contributions credited to the Account on behalf of the Participant and earnings, expenses, gains and losses credited thereto, and deemed investments made with amounts in the Participant's Account. The Administrator will establish and maintain such other accounts and records as it decides in its discretion to be reasonably required or appropriate in order to discharge its duties under the Plan. Participants will be furnished statements of their Account values at least once each Plan Year. The Administrator shall provide the Trustee with information on the amount credited to the separate account of each Participant maintained by the Administrator in its records.

ARTICLE 6. INVESTMENT OF CONTRIBUTIONS.

6.01. MANNER OF INVESTMENT. All amounts credited to the Accounts of Participants shall be treated as though invested and reinvested only in eligible investments selected by the Employer in the Service Agreement.

6.02. INVESTMENT DECISIONS. Investments in which the Accounts of Participants shall be treated as invested and reinvested shall be directed by the Employer or by each Participant, or both, in accordance with the Employer's election in
Section 1.11(a).

(a) All dividends, interest, gains and distributions of any nature that would be earned in respect of Fund Shares in which the Account is treated as investing shall be credited to the Account as though reinvested in additional shares of that Permissible Investment.


(b) Expenses that would be attributable to the acquisition of investments shall be charged to the Account of the Participant for which such investment is treated as having been made.

ARTICLE 7. RIGHT TO BENEFITS.

7.01. NORMAL OR EARLY RETIREMENT. If provided by the Employer in Section 1.07(e), each Participant who attains his Normal Retirement Age or Early Retirement Age will have a nonforfeitable interest in his Account in accordance with the vesting schedule(s) elected in Section 1.07. If a Participant retires on or after attainment of Normal or Early Retirement Age, such retirement is referred to as a normal retirement. On or after his normal retirement, the balance of the Participant's Account, plus any amounts thereafter credited to his Account, subject to the provisions of Section 7.06, will be distributed to him in accordance with Article 8.

If provided by the Employer in Section 1.07, a Participant who separates from service before satisfying the age requirements for early retirement, but has satisfied the service requirement will be entitled to the distribution of his Account, subject to the provisions of Section 7.06, in accordance with Article 8, upon satisfaction of such age requirement.

7.02. DEATH. If a Participant dies before the distribution of his Account has commenced, or before such distribution has been completed, his Account shall become vested in accordance with the vesting schedule(s) elected in Section 1.07 and his designated Beneficiary or Beneficiaries will be entitled to receive the balance or remaining balance of his Account, plus any amounts thereafter credited to his Account, subject to the provisions of Section 7.06. Distribution to the Beneficiary or Beneficiaries will be made in accordance with Article 8.

A Participant may designate a Beneficiary or Beneficiaries, or change any prior designation of Beneficiary or Beneficiaries, by giving notice to the Administrator on a form designated by the Administrator. If more than one person is designated as the Beneficiary, their respective interests shall be as indicated on the designation form.

A copy of the death certificate or other sufficient documentation must be filed with and approved by the Administrator. If upon the death of the Participant there is, in the opinion of the Administrator, no designated Beneficiary for part or all of the Participant's Account, such amount will be paid to his surviving spouse or, if none, to his estate (such spouse or estate shall be deemed to be the Beneficiary for purposes of the Plan). If a Beneficiary dies after benefits to such Beneficiary have commenced, but before they have been completed, and, in the opinion of the Administrator, no person has been designated to receive such remaining benefits, then such benefits shall be paid to the deceased Beneficiary's estate.

7.03. OTHER TERMINATION OF EMPLOYMENT. If provided by the Employer in Section 1.07, if a Participant terminates his employment for any reason other than death or normal retirement, he will be entitled to a termination benefit equal to (i) the vested percentage(s) of the value of the Matching Contributions to his Account, as adjusted for income, expense, gain, or loss, such percentage(s) determined in accordance with the vesting schedule(s) selected by the Employer in Section 1.07, and (ii) the value of the Deferral Contributions to his Account as adjusted for income, expense, gain or loss. The amount payable under this
Section 7.03 will be subject to the provisions of Section 7.06 and will be distributed in accordance with Article 8.

7.04. SEPARATE ACCOUNT. If a distribution from a Participant's Account has been made to him at a time when he has a nonforfeitable right to less than 100 percent of his Account, the vesting schedule in Section 1.07 will thereafter apply only to amounts in his Account attributable to Matching Contributions allocated after such distribution. The balance of his Account immediately after such distribution will be transferred to a separate account that will be maintained for the purpose of determining his interest therein according to the following provisions.

At any relevant time prior to a forfeiture of any portion thereof under
Section 7.05, a Participant's nonforfeitable interest in his Account held in a separate account described in the preceding paragraph will be equal to P(AB + (RxD))-(RxD), where P is the nonforfeitable percentage at the relevant time determined under Section 7.05; AB is the account balance of the separate account at the relevant time; D is the amount of the distribution; and R is the ratio of the account balance at the relevant time to the account balance after distribution. Following a forfeiture of any portion of such separate account under Section 7.05 below, any balance in the Participant's separate account will remain fully vested and nonforfeitable.

7.05. FORFEITURES. If a Participant terminates his employment, any portion of his Account (including any amounts credited after his termination of employment) not payable to him under Section 7.03 will be forfeited by him.


7.06. ADJUSTMENT FOR INVESTMENT EXPERIENCE. If any distribution under this Article 7 is not made in a single payment, the amount remaining in the Account after the distribution will be subject to adjustment until distributed to reflect the income and gain or loss on the investments in which such amount is treated as invested and any expenses properly charged under the Plan to such amounts.

7.07. UNFORESEEABLE EMERGENCY WITHDRAWALS. Subject to the provisions of Article 8, a Participant shall not be permitted to withdraw his Account (and earnings thereon) prior to retirement or termination of employment, except that, to the extent permitted under Section 1.09, a Participant may apply to the Administrator to withdraw some or all of his Account if such withdrawal is made on account of a unforeseeable emergency as determined by the Administrator.

7.08. CHANGE IN CONTROL. If the Employer has elected to apply Section 1.06(c), then, upon a Change in Control, as defined in Section 1.12, notwithstanding any other provision of the Plan to the contrary, all Participants shall have a nonforfeitable right to receive the entire amount of their account balances under the Plan and all such amounts shall be paid out to Participants as soon as administratively practicable.

ARTICLE 8. DISTRIBUTION OF BENEFITS.

8.01. FORM OF DISTRIBUTION OF BENEFITS TO PARTICIPANTS AND BENEFICIARIES. The Plan provides for distribution as a lump sum to be paid in cash on the date specified by the Employer in Section 1.06 pursuant to the method provided in
Section 8.02. If elected by the Employer in Section 1.10 and specified in the Participant's deferral election, the distribution will be paid through a systematic withdrawal plan (installments) for a time period not exceeding 10 years beginning on the date specified by the Employer in Section 1.06.

8.02. EVENTS REQUIRING DISTRIBUTION OF BENEFITS TO PARTICIPANTS AND BENEFICIARIES.

(a) If elected by the Employer in Section 1.06(a), the Participant will receive a distribution upon the earliest of the events specified by the Employer in Section 1.06(a), subject to the provisions of Section 7.08, and at the time indicated in Section 1.06(a)(2). If the Participant dies before any event in Section 1.06(a) occurs, the Participant shall be considered to have terminated employment and the Participant's benefit will be paid to the Participant's Beneficiary in the same form and at the same time as it would have been paid to the Participant pursuant to this Article 8.

(b) If elected by the Employer in Section 1.06(b), the Participant will receive a distribution of all amounts not deferred pursuant to Section
1.06(b)(1)(B) (and earnings attributable to those amounts) upon termination of employment. If elected by the Employer in Section 1.06(b)(1)(B), the Participant shall have the election to receive distributions of amounts deferred pursuant to Section 4.01 (and earnings attributable to those amounts) after a date specified by the Participant in his deferral election which is at least 12 months after the first day of the calendar year in which such amounts would be earned. Amounts distributed to the Participant pursuant to Section 1.06(b) shall be distributed at the time indicated in Section 1.06(b)(2). Subject to the provisions of Section 7.08, the Participant shall receive a distribution in the form provided in Section 8.01. If the Participant dies before any event in Section 1.06(a) occurs, the Participant shall be considered to have terminated employment and the Participant's benefit will be paid to the Participant's Beneficiary in the same form and at the same time as it would have been paid to the Participant pursuant to this Article 8. However, if the Participant dies before the date specified by the Participant in an election pursuant to Section 1.06(b)(1)(B), then the Participant's benefit shall be paid to the Participant's Beneficiary in the form provided in Section 8.01 as if the Participant had elected to be paid at termination of employment.

8.03. DETERMINATION OF METHOD OF DISTRIBUTION. The Participant will determine the method of distribution of benefits to himself and his Beneficiary, subject to the provisions of Section 8.02. Such determination will be made at the time the Participant makes a deferral election. Unless the Employer has elected
Section 1.06(b) to control distributions, the period certain specified in a Participant's first deferral election specifying distribution under a systematic withdrawal plan shall apply to all subsequent elections of distributions under a systematic withdrawal plan made by the Participant. Once a Participant has made an election for the method of distribution, that election shall be effective for all contributions made on behalf of the Participant attributable to any Plan Year after that election was made and before the Plan Year in which that election was altered in the manner prescribed by the Administrator. If the Participant does not designate in the manner prescribed by the Administrator the method of distribution to him and his Beneficiary, the method of distribution shall be a lump sum at termination of employment.


8.04. NOTICE TO TRUSTEE. The Administrator will notify the Trustee, pursuant to the method stated in the Trust Agreement for providing direction, whenever any Participant or Beneficiary is entitled to receive benefits under the Plan. The Administrator's notice shall indicate the form, amount and frequency of benefits that such Participant or Beneficiary shall receive.

8.05. TIME OF DISTRIBUTION. In no event will distribution to a Participant be made later than the date specified by the Participant in his salary reduction agreement. All distributions will be made as soon as administratively feasible following the distribution date specified in Section 1.06 or Section 7.08, if applicable.

ARTICLE 9. AMENDMENT AND TERMINATION.

9.01 AMENDMENT BY EMPLOYER. The Employer reserves the authority to amend the Plan by filing with the Trustee an amended Adoption Agreement, executed by the Employer only, on which said Employer has indicated a change or changes in provisions previously elected by it. Such changes are to be effective on the effective date of such amended Adoption Agreement. Any such change notwithstanding, no Participant's Account shall be reduced by such change below the amount to which the Participant would have been entitled if he had voluntarily left the employ of the Employer immediately prior to the date of the change. The Employer may from time to time make any amendment to the Plan that may be necessary to satisfy the Code or ERISA. The Employer's board of directors or other individual specified in the resolution adopting this Plan shall act on behalf of the Employer for purposes of this Section 9.01.

9.02 RETROACTIVE AMENDMENTS. An amendment made by the Employer in accordance with Section 9.01 may be made effective on a date prior to the first day of the Plan Year in which it is adopted if such amendment is necessary or appropriate to enable the Plan and Trust to satisfy the applicable requirements of the Code or ERISA or to conform the Plan to any change in federal law or to any regulations or ruling thereunder. Any retroactive amendment by the Employer shall be subject to the provisions of Section 9.01.

9.03. TERMINATION. The Employer has adopted the Plan with the intention and expectation that contributions will be continued indefinitely. However, said Employer has no obligation or liability whatsoever to maintain the Plan for any length of time and may discontinue contributions under the Plan or terminate the Plan at any time by written notice delivered to the Trustee without any liability hereunder for any such discontinuance or termination.

9.04. DISTRIBUTION UPON TERMINATION OF THE PLAN. Upon termination of the Plan, no further Deferral Contributions or Matching Contributions shall be made under the Plan, but Accounts of Participants maintained under the Plan at the time of termination shall continue to be governed by the terms of the Plan until paid out in accordance with the terms of the Plan.

ARTICLE 10. MISCELLANEOUS.

10.01. COMMUNICATION TO PARTICIPANTS. The Plan will be communicated to all Participants by the Employer promptly after the Plan is adopted.

10 02. LIMITATION OF RIGHTS. Neither the establishment of the Plan and the Trust, nor any amendment thereof, nor the creation of any fund or account, nor the payment of any benefits, will be construed as giving to any Participant or other person any legal or equitable right against the Employer, Administrator or Trustee, except as provided herein; and in no event will the terms of employment or service of any Participant be modified or in any way affected hereby.

10.03. NONALIENABILITY OF BENEFITS. The benefits provided hereunder will not be subject to alienation, assignment, garnishment, attachment, execution or levy of any kind, either voluntarily or involuntarily, and any attempt to cause such benefits to be so subjected will not be recognized, except to such extent as may be required by law.

10 04. FACILITY OF PAYMENT. In the event the Administrator determines, on the basis of medical reports or other evidence satisfactory to the Administrator, that the recipient of any benefit payments under the Plan is incapable of handling his affairs by reason of minority, illness, infirmity or other incapacity, the Administrator may disburse such payments, or direct the Trustee to disburse such payments, as applicable, to a person or institution designated by a court which has jurisdiction over such recipient or a person or institution otherwise having the legal authority under State law for the care and control of such recipient. The receipt by such person or institution of any such payments shall be complete acquittance therefore, and any such payment to the extent thereof, shall discharge the liability of the Trust for the payment of benefits hereunder to such recipient.


10.05. INFORMATION BETWEEN EMPLOYER AND TRUSTEE. The Employer agrees to furnish the Trustee, and the Trustee agrees to furnish the Employer with such information relating to the Plan and Trust as may be required by the other in order to carry out their respective duties hereunder, including without limitation information required under the Code or ERISA and any regulations issued or forms adopted thereunder.

10.06. NOTICES. Any notice or other communication in connection with this Plan shall be deemed delivered in writing if addressed as provided below and if either actually delivered at said address or, in the case of a letter, three business days shall have elapsed after the same shall have been deposited in the United States mails, first-class postage prepaid and registered or certified:

(a) If to the Employer or Administrator, to it at the address set forth in the Adoption Agreement, to the attention of the person specified to receive notice in the Adoption Agreement;

(b) If to the Trustee, to it at the address set forth in the Trust Agreement;

or, in each case at such other address as the addressee shall have specified by written notice delivered in accordance with the foregoing to the addressor's then effective notice address.

10.07. GOVERNING LAW. The Plan and the accompanying Adoption Agreement will be construed, administered and enforced according to ERISA, and to the extent not preempted thereby, the laws of the Commonwealth of Massachusetts, without regard to its conflicts of law principles.

ARTICLE 11. PLAN ADMINISTRATION.

11.01. POWERS AND RESPONSIBILITIES OF THE ADMINISTRATOR. The Administrator has the full power and the full responsibility to administer the Plan in all of its details, subject, however, to the applicable requirements of ERISA. The Administrator's powers and responsibilities include, but are not limited to, the following:

(a) To make and enforce such rules and regulations as it deems necessary or proper for the efficient administration of the Plan;

(b) To interpret the Plan, its interpretation thereof in good faith to be final and conclusive on all persons claiming benefits under the Plan;

(c) To decide all questions concerning the Plan and the eligibility of any person to participate in the Plan;

(d) To administer the claims and review procedures specified in Section 11.03;

(e) To compute the amount of benefits which will be payable to any Participant, former Participant or Beneficiary in accordance with the provisions of the Plan;

(f) To determine the person or persons to whom such benefits will be paid;

(g) To authorize the payment of benefits;

(h) To comply with any applicable reporting and disclosure requirements of

Part 1 of Subtitle B of Title I of ERISA;

(i) To appoint such agents, counsel, accountants, and consultants as may be required to assist in administering the Plan;

(j) By written instrument, to allocate and delegate its responsibilities, including the formation of an Administrative Committee to administer the Plan;

11.02. NONDISCRIMINATORY EXERCISE OF AUTHORITY. Whenever, in the administration of the Plan, any discretionary action by the Administrator is required, the Administrator shall exercise its authority in a nondiscriminatory manner so that all persons similarly situated will receive substantially the same treatment.


11.03. CLAIMS AND REVIEW PROCEDURES.

(a) Claims Procedure. If any person believes he is being denied any rights or benefits under the Plan, such person may file a claim in writing with the Administrator. If any such claim is wholly or partially denied, the Administrator will notify such person of its decision in writing. Such notification will contain (i) specific reasons for the denial, (ii) specific reference to pertinent Plan provisions, (iii) a description of any additional material or information necessary for such person to perfect such claim and an explanation of why such material or information is necessary, and (iv) information as to the steps to be taken if the person wishes to submit a request for review, including a statement of the such person's right to bring a civil action under Section 502(a) of ERISA following as adverse determination upon review. Such notification will be given within 90 days after the claim is received by the Administrator (or within 180 days, if special circumstances require an extension of time for processing the claim, and if written notice of such extension and circumstances is given to such person within the initial 90-day period).

If the claim concerns disability benefits under the Plan, the Plan Administrator must notify the claimant in writing within 45 days after the claim has been filed in order to deny it. If special circumstances require an extension of time to process the claim, the Plan Administrator must notify the claimant before the end of the 45-day period that the claim may take up to 30 days longer to process. If special circumstances still prevent the resolution of the claim, the Plan Administrator may then only take up to another 30 days after giving the claimant notice before the end of the original 30-day extension. If the Plan Administrator gives the claimant notice that the claimant needs to provide additional information regarding the claim, the claimant must do so within 45 days of that notice.

(b) Review Procedure. Within 60 days after the date on which a person receives a written notice of a denied claim (or, if applicable, within 60 days after the date on which such denial is considered to have occurred), such person (or his duly authorized representative) may (i) file a written request with the Administrator for a review of his denied claim and of pertinent documents and (ii) submit written issues and comments to the Administrator. This written request may include comments, documents, records, and other information relating to the claim for benefits. The claimant shall be provided, upon the claimant's request and free of charge, reasonable access to, and copies of, all documents, records, and other information relevant to the claim for benefits. The review will take into account all comments, documents, records, and other information submitted by the claimant relating to the claim, without regard to whether such information was submitted or considered in the initial benefit determination. The Administrator will notify such person of its decision in writing. Such notification will be written in a manner calculated to be understood by such person and will contain specific reasons for the decision as well as specific references to pertinent Plan provisions. The decision on review will be made within 60 days after the request for review is received by the Administrator (or within 120 days, if special circumstances require an extension of time for processing the request, such as an election by the Administrator to hold a hearing, and if written notice of such extension and circumstances is given to such person within the initial 60-day period). The extension notice shall indicate the special circumstances requiring an extension of time and the date by which the Plan expects to render the determination on review.

If the initial claim was for disability benefits under the Plan and has been denied by the Plan Administrator, the claimant will have 180 days from the date the claimant received notice of the claim's denial in which to appeal that decision. The review will be handled completely independently of the findings and decision made regarding the initial claim and will be processed by an individual who is not a subordinate of the individual who denied the initial claim. If the claim requires medical judgment, the individual handling the appeal will consult with a medical professional whom was not consulted regarding the initial claim and who is not a subordinate of anyone consulted regarding the initial claim and identify that medical professional to the claimant.

The Plan Administrator shall provide the claimant with written notification of a plan's benefit determination on review. In the case of an adverse benefit determination, the notification shall set forth, in a manner calculated to be understood by the claimant - the specific reason or reasons for the adverse determinations, reference to the specific plan provisions on which the benefit determination is based, a statement that the claimant is entitled to receive, upon the claimant's request and free of charge, reasonable access to, and copies of, all documents, records, and other information relevant to the claim for benefits.


THE CORPORATEPLAN FOR RETIREMENT(SM)
EXECUTIVE PLAN

ADOPTION AGREEMENT

IMPORTANT NOTE

This document has not been approved by the Department of Labor, the Internal Revenue Service or any other governmental entity. An Adopting Employer must determine whether the plan is subject to the Federal securities laws and the securities laws of the various states. An Adopting Employer may not rely on this document to ensure any particular tax consequences or to ensure that the Plan is "unfunded and maintained primarily for the purpose of providing deferred compensation to a select group of management or highly compensated employees" under the Employee Retirement Income Security Act with respect to the Employer's particular situation. Fidelity Management Trust Company, its affiliates and employees cannot provide you with legal advice in connection with the execution of this document. This document should be reviewed by the Employer's attorney prior to execution.


ADOPTION AGREEMENT
ARTICLE 1

1.01 PLAN INFORMATION

(a) NAME OF PLAN:

This is the Wabash National Corporation Supplemental Plan

__________________________________________________Plan (the "Plan").

(b) NAME OF PLAN ADMINISTRATOR, IF NOT THE EMPLOYER:


Address: ___________________________________________________________

Phone Number: ______________________________________________________

The Plan Administrator is the agent for service of legal process for the Plan.

(c) PLAN YEAR END is December 31.

(d) PLAN STATUS (check one):

(1) [X] Effective Date of new Plan: 2/01/03

(2) [ ] Amendment Effective Date: ______________________

The original effective date of the Plan: _______________

1.02 EMPLOYER

(a) THE EMPLOYER IS: Wabash National Corporation

Address:         1000 Sagamore Parkway South

                 Lafayette, IN 47903

Contact's Name:  Mr. Raymond Sheagley

Telephone Number: 765-771-5300

(1) Employer's Tax Identification Number: 52-1375208


(2) Business form of Employer (check one):

(A) [X] Corporation (Other than a Subchapter S corporation)

(B) [ ] Other (e.g., Subchapter S corporation, partnership, sole proprietor)

(3) Employer's fiscal year end: December 31

(b) THE TERM "EMPLOYER" INCLUDES THE FOLLOWING RELATED EMPLOYER(s) (as defined in Section 2.01(a)(21)):






1.03 COVERAGE

(a) THE FOLLOWING EMPLOYEES ARE ELIGIBLE TO PARTICIPATE IN THE PLAN:

(1) [ ] Only those Employees listed in Attachment A will be eligible to participate in the Plan.

(2) [X] Only those Employees in the eligible class described below will be eligible to participate in the Plan: Salary Grades 11-18

(3) [ ] Only those Employees described in the Board of Directors Resolutions attached hereto and hereby made a part hereof will be eligible to participate in the Plan.

(b) THE ENTRY DATE(s) SHALL BE (check one):

(1)   [ ] each January 1.

(2)   [ ] each January 1 and each July 1.

(3)   [ ] each January 1 and each April 1, July 1 and October 1.

(4)   [ ] the first day of each month.


(5) [X] immediate upon meeting the eligibility requirements

                      specified in Subsection 1.04(a).

1.04  COMPENSATION

      FOR PURPOSES OF DETERMINING CONTRIBUTIONS UNDER THE PLAN, COMPENSATION
      SHALL BE AS DEFINED (CHECK (a) OR (b) BELOW, AS APPROPRIATE):

      (a)   [X] IN SECTION 2.01(a)(6), (check (1) or (2) below, if and as
            appropriate)):

                  (1)   [ ] but excluding (check the appropriate box(es)):

                            (A)  [ ] Overtime Pay.

                            (B)  [ ] Bonuses.

                            (C)  [ ] Commissions.

                            (D)  [ ] The value of a qualified or a non-qualified
                                      stock option granted to an Employee by the
                                      Employer to the extent such value is
                                      includable in the Employee's taxable
                                      income.

                            (E)  [ ]  The following:

                                   _____________________________________________
                                   _____________________________________________
                                   _____________________________________________

(2) [ ] except as otherwise provided below:




(b) [ ] IN THE ________________________PLAN MAINTAINED BY THE EMPLOYER TO THE EXTENT IT IS IN EXCESS OF THE LIMIT IMPOSED UNDER CODE
SECTION 401(a)(17).

1.05  CONTRIBUTIONS

      (a)   EMPLOYEE CONTRIBUTIONS (COMPLETE ALL THAT APPLY)

                  (1)   [X] Deferral Contributions. The Employer shall make a
                        Deferral Contribution in accordance with, and subject
                        to, Section 4.01 on behalf of each Participant who has
                        an executed salary reduction agreement in effect with
                        the Employer for the calendar year (or portion of the
                        calendar year) in question, not to exceed __60_______%
                        of Compensation for that calendar year, subject,
                        however, to any election regarding bonuses, as set out
                        in Subsection 1.05(a)(2).

                  (2)   [X] Bonus Contributions. The Employer may allow
                        Participants upon proper notice and approval to enter
                        into a special salary reduction agreement to make
                        Deferral


Contributions in an amount up to 100% of any Employer paid cash bonuses designated by the Employer that are made for such Participants during the calendar year. The Compensation definition elected by the Employer in Section 1.04 must include bonuses if bonus contributions are permitted.

(b) [X] MATCHING CONTRIBUTIONS (CHOOSE (1) OR (2) BELOW, AND (3) BELOW, AS APPLICABLE.)

(1) [X] The Employer shall make a Matching Contribution on behalf of each Participant in an amount equal to the following percentage of a Participant's Deferral Contributions during the Plan Year (check one):

(A) [ ] 50%

(B) [ ] 100%

(C) [ ]_________ %

(D) [X] (Tiered Match) 100 % of the first 3 % of the Participant's Compensation contributed to the Plan,

50 % of the next 2 % of the Participant's Compensation contributed to the Plan,

__________% of the next _____________% of the Participant's Compensation contributed to the Plan.

(E) [ ] The percentage declared for the year, if any, by a Board of Directors' resolution.

(F) [ ] Other: ________________________________________


(2) [ ] Matching Contribution Offset. For each Participant who has made deferrals of at least the maximum amount allowed pursuant to Section 402(g) of the Code or the maximum allowed under the Employer's plan listed below to such plan, the Employer shall make a Matching Contribution in an amount equal to (A) minus (B) below:

(A) The Matching Employer Contribution, as defined in the ___________________________ Plan that the Participant would have received under the ______________Plan on the sum of the Deferral Contributions and the Participant's deferrals hereunder, as defined therein, that the Participant actually made to such Plan, if no limits otherwise imposed by the Code, and regulations issued thereunder, applied


to such Matching Employer Contribution and the Participant's Deferral Contributions are deemed to have been made to the Plan;

(B) The Matching Employer Contributions actually made to such Participant under the ___________________________ Plan for the Plan Year of the determination of the Matching Contribution hereunder.

(3) [ ] Matching Contribution Limits (check the appropriate box(es)):

(A) [ ] Deferral Contributions in excess of ________% of the Participant's Compensation for the period in question shall not be considered for Matching Contributions.

Note: If the Employer elects a percentage limit in (A) above and requests the Trustee to account separately for matched and unmatched Deferral Contributions, the Matching Contributions allocated to each Participant must be computed, and the percentage limit applied, based upon each period.

(B) [ ] Matching Contributions for each Participant for each Plan Year shall be limited to $___________.

(4) Eligibility Requirement(s) for Matching Contributions. A Participant who makes Deferral Contributions during the Plan Year under Section 1.05(a) shall be entitled to Matching Contributions for that Plan Year if the Participant satisfies the following requirement(s) (Check the appropriate box(es). Options (B) and (C) may not be elected together):

(A) [ ] Is employed by the Employer on the last day of the Plan Year.

(B) [ ] Earns at least 500 Hours of Service during the Plan Year.

(C) [ ] Earns at least 1,000 Hours of Service during the Plan Year.

(D) [X] Other: Employed at least 3 calendar months .

(E) [ ] No requirements.

NOTE: If option (A), (B) or (C) above is selected, then Matching Contributions can only be MADE by the Employer AFTER the Plan Year ends. Any Matching Contribution made before Plan Year end shall not be subject to the eligibility requirements of this Section 1.05(b)(3)).

(c) EMPLOYER CONTRIBUTIONS


(1) [ ] Fixed Employer Contributions. The Employer shall make an Employer Contribution on behalf of each Participant in an amount determined as described below (check at least one):

(A)  [ ]  In an amount equal to __% of each Participant's
          Compensation each Plan Year.

(B)  [ ]  In an amount determined and allocated as described below:

          __________________________________________________________
          __________________________________________________________
          __________________________________________________________
          __________________________________________________________

(C) [ ] In an amount equal to (check at least one):

(i). [ ] Any profit sharing contribution that the Employer would have made on behalf of the Participant under the following qualified defined contribution plan but for the limitations imposed by Code Section 401(a)(17):

(ii) [ ] Any contribution described in Code Section 401(m) that the Employer would have made on behalf of the Participant under the following qualified defined contribution plan but for the limitations imposed by Code Section 401(a)(17):



(2) [X] Discretionary Employer Contributions. The Employer may make Employer Contributions to the accounts of Participants in any amount, as determined by the Employer in its sole discretion from time to time, which amount may be zero.

(3) Eligibility Requirement(s) for Employer Contributions. A Participant shall only be entitled to Employer Contributions under Section 1.05(c)(1) for a Plan Year if the Participant satisfies the following requirement(s) (Check the appropriate box(es). Options (B) and (C) may not be elected together):

(A) [ ] Is employed by the Employer on the last day of the Plan Year.

(B) [ ] Earns at least 500 Hours of Service during the Plan Year.

(C) [ ] Earns at least 1,000 Hours of Service during the Plan Year.

(D) [X] Other: Employed at least 3 calendar months

(E) [ ] No requirements.


1.06  DISTRIBUTION DATES

            Distribution from a Participant's Account pursuant to Section 8.02
            shall begin upon the following date(s) (check either (a) or (b);
            check (c), if desired):

            (a)   [X]   NON-CLASS YEAR ACCOUNTING (COMPLETE (1) AND (2)).

                        (1) The earliest of termination of employment with the
                        Employer and the following event(s) (check appropriate
                        box(es); if none selected, all distributions will be
                        upon termination of employment):

                            (A)   [X] Attainment of Normal Retirement Age (as
                                      defined in Section 1.07(f)).

                            (B)   [X] Attainment of Early Retirement Age (as
                                      defined in Section 1.07(g)).

                            (C)   [X] The date on which the Participant becomes
                                      disabled (as defined in Section 1.07(h)).

                        (2)Timing of distribution (check either (A) or (B)).

                             (A)  [X] The Distribution of the Participant's
                                      Account will be begin in the month
                                      following the event described in (a)(1)
                                      above.

                             (B)  [ ] The Distribution of the Participant's
                                      Account will begin as soon as
                                      administratively feasible in the calendar
                                      year following distribution event
                                      described in (a)(1) above.

(b) [ ] CLASS YEAR ACCOUNTING (COMPLETE (1) AND (2)).

(1) Upon (check at least one; (A) must be selected if

 plan has contributions pursuant to section 1.05(b)
 or (c)):

(A)  [ ] Termination of employment with the
         Employer.

(B)  [ ]   The date elected by the Participant,
         pursuant to Plan Section 8.02, and subject
         to the restrictions imposed in Plan
         Section 8.02 with respect to future
         Deferral Contributions, in which event
         such date of distribution must be at least
         one year after the date such Deferral
         Contribution would have been paid to the
         Participant in cash in the absence of the
         election to make the Deferral
         Contribution.

(2) Timing of distribution (check either (A) or (B)).

(A) [ ] The Distribution of the Participant's Account will begin _______ (specify month and day)following the event described in
(b)(1) above.


(B) [ ] The Distribution of the Participant's Account will begin _______ (specify month and day) of the calendar year following the event described in (b)(1) above.

(c) [X] AS SOON AS ADMINISTRATIVELY FEASIBLE FOLLOWING A CHANGE OF CONTROL (AS DEFINED IN SECTION 1.12).

1.07 VESTING SCHEDULE

(a) THE PARTICIPANT'S VESTED PERCENTAGE IN MATCHING CONTRIBUTIONS ELECTED IN SECTION 1.05(b) SHALL BE BASED UPON THE SCHEDULE(s) SELECTED BELOW.

(1) [ ] N/A - No Matching Contributions

(2) [X] 100% Vesting immediately

(3) [ ] 3 year cliff (see C below)

(4) [ ] 5 year cliff (see D below)

(5) [ ] 6 year graduated (see E below)

(6) [ ] 7 year graduated (see F below)

(7) [ ] G below

(8) [ ] Other (Attachment "B")

 YEARS OF                   VESTING SCHEDULE
SERVICE FOR                 ----------------
  VESTING      C      D      E           F      G
-----------   ----   ----   ----        ----   ----
    0           0%     0%     0%          0%   ___
    1           0%     0%     0%          0%   ___
    2           0%     0%    20%          0%   ___
    3         100%     0%    40%         20%   ___
    4         100%     0%    60%         40%   ___
    5         100%   100%    80%         60%   ___
    6         100%   100%   100%         80%   ___
    7         100%   100%   100%        100%   100%

(b) THE PARTICIPANT'S VESTED PERCENTAGE IN EMPLOYER CONTRIBUTIONS ELECTED IN SECTION 1.05(c) SHALL BE BASED UPON THE SCHEDULE(s) SELECTED BELOW.

(1) [ ] N/A - No Employer Contributions

(2) [X] 100% Vesting immediately

(3) [ ] 3 year cliff (see C below)

(4) [ ] 5 year cliff (see D below)

(5) [ ] 6 year graduated (see E below)


(6) [ ] 7 year graduated (see F below)

(7) [ ] G below

(8) [ ] Other (Attachment "B")

 YEARS OF                   VESTING SCHEDULE
SERVICE FOR                 ----------------
  VESTING      C      D      E           F      G
-----------   ----   ----   ----        ----   ----
    0           0%     0%     0%          0%   ___
    1           0%     0%     0%          0%   ___
    2           0%     0%    20%          0%   ___
    3         100%     0%    40%         20%   ___
    4         100%     0%    60%         40%   ___
    5         100%   100%    80%         60%   ___
    6         100%   100%   100%         80%   ___
    7         100%   100%   100%        100%   100%

(c) [ ] YEARS OF SERVICE FOR VESTING SHALL EXCLUDE (check one):

(1)[ ] for new plans, service prior to the Effective Date as defined in Section 1.01(e)(1).

(2)[ ] for existing plans converting from another plan document, service prior to the original Effective Date as defined in Section 1.01(e)(2).

(d)[X] A PARTICIPANT WILL FORFEIT HIS MATCHING CONTRIBUTIONS AND EMPLOYER CONTRIBUTIONS UPON THE OCCURRENCE OF THE FOLLOWING EVENT (s):

"Cause" means, with respect to a Participant, (1) commission by the Particpant of a felony or other serious crime, (2) fraudulent or dishonest conduct by the Participant intended to benefit the Participant at the expense of the Employer, or (3) action by the Participant that brings the Employer into disrepute or otherwise harms the Employer's reputation. Section. Forfeiture of Matching Account Upon Termination for Cause. In the event a Participant's employment with the Employer is terminated for Cause, the Participant's Matching Account will be forfeited, and the Participant will not derive any benefit under the Plan from that Account.

(e) A PARTICIPANT WILL BE 100% VESTED IN HIS MATCHING CONTRIBUTIONS AND EMPLOYER CONTRIBUTIONS UPON (CHECK THE APPROPRIATE BOX(ES), IF ANY; IF 1.06(c) IS SELECTED, PARTICIPANTS WILL AUTOMATICALLY VEST UPON CHANGE OF CONTROL AS DEFINED IN SECTION 1.12):

(1) [X]  Normal Retirement Age (as defined in Section 1.07(e)).

(2) [X]  Early Retirement Age (as defined in Section 1.07(f)).

(3) [X]  Death.


(4) [X] The date on which the Participant becomes disabled, as determined under Section 1.07(h) of the Plan.

(f) NORMAL RETIREMENT AGE UNDER THE PLAN IS (check one):

(1) [X] age 65.

(2) [ ] age (specify from 55 through 64).

(3) [ ] the later of age ___ (cannot exceed 65) or the fifth anniversary of the Participant's Commencement Date.

If no box is checked in this Section 1.07(f), then Normal Retirement Age is 65.

(g) [X] EARLY RETIREMENT AGE IS THE FIRST DAY OF THE MONTH AFTER THE PARTICIPANT ATTAINS AGE 55 (SPECIFY 55 OR GREATER) AND COMPLETES 1 YEARS OF SERVICE FOR VESTING.

(h) [X] THE DATE ON WHICH A PARTICPANT BECOMES DISABLED IS DETERMINED (CHECK ONE):

(1) [X] under the long-term disability plan maintained by the Employer in which the Participant participates.

(2) [ ] under Title II or XVI of the Social Security Act.

(3) [ ] in the sole discretion of the Administrator based on factors applied in a uniform and nondiscriminatory manner.

1.08 PREDECESSOR EMPLOYER SERVICE

[ ] SERVICE FOR PURPOSES OF VESTING IN SECTION 1.07(a) AND (b) SHALL
INCLUDE SERVICE WITH THE FOLLOWING EMPLOYER(s):

      (a) ______________________________________________________________________

      (b) ______________________________________________________________________

      (c) ______________________________________________________________________

      (d) ______________________________________________________________________

1.09  UNFORESEEABLE EMERGENCY WITHDRAWALS

      PARTICIPANT WITHDRAWALS FOR UNFORESEEABLE EMERGENCY PRIOR TO TERMINATION
      OF EMPLOYMENT (check one; (b) must be selected if 1.06(b) has been
      selected):


(a) [X] WILL BE ALLOWED IN ACCORDANCE WITH SECTION 7.07, SUBJECT TO A $ 5,000 MINIMUM AMOUNT. (MUST BE AT LEAST $1,000)

(b) [ ] WILL NOT BE ALLOWED.

1.10  DISTRIBUTIONS

      SUBJECT TO ARTICLES 7 AND 8 DISTRIBUTIONS UNDER THE PLAN ARE ALWAYS
      AVAILABLE AS A LUMP SUM. CHECK BELOW TO ALLOW DISTRIBUTIONS IN INSTALLMENT
      PAYMENTS:

      [X]   UNDER A SYSTEMATIC WITHDRAWAL PLAN (INSTALLMENTS) NOT TO EXCEED 10
            YEARS.

1.11  INVESTMENT DECISIONS

      (a)   INVESTMENT DIRECTIONS

            Investments in which the Accounts of Participants shall be treated

as invested and reinvested shall be directed (check one):

(1) [ ] by the Employer among the options listed in (b) below.

(2) [X] by each Participant among the options listed in (b) below.

(3) [ ] in accordance with investment directions provided by each Participant for all contribution sources in a Participant's Account except the following sources shall be invested as directed by the Employer (check (A) and/or (B)):

(A) [ ] Nonelective Employer Contributions

(B) [ ] Matching Employer Contributions

The Employer must direct the applicable sources among the same investment options made available for Participant directed sources listed in the Service Agreement.

(b) PLAN INVESTMENT OPTIONS

            Participant Accounts will be treated as invested among the
            Investment Funds listed in the Service Agreement from time to time
            pursuant to Participant and/or Employer directions, as applicable.

            NOTE: The method and frequency for change of investments will be
                  determined under the rules applicable to the selected funds.
                  Information will be provided regarding expenses, if any, for
                  changes in investment options.

1.12  CHANGE IN CONTROL

      IF SECTION 1.06(c) IS SELECTED, THEN, PURSUANT TO SECTION 7.08 AND
      NOTWITHSTANDING ANY OTHER PROVISION OF THE PLAN TO THE CONTRARY, THE
      ACCOUNT BALANCES OF ALL PARTICIPANTS SHALL THE BECOME

      IMMEDIATELY NONFORFEITABLE AND SHALL BECOME PAYABLE TO THE PARTICIPANTS AS
      SOON AS PRACTICABLE UPON A CHANGE IN THE CONTROL OF THE EMPLOYER, AS

DEFINED BELOW:

"Change of Control" means any of the following events: (A) any "person," as that term is used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended ("Exchange Act"), other than a person currently a "beneficial owner" (as defined in Rule 13d-3 under the Exchange Act) of the Company's securities becomes, after the effective date of the Plan, the beneficial owner, directly or indirectly, of securities of the Company representing 50% or more of the combined voting power of the Company's then outstanding securities; (B) during any 2-year period, individuals who at the beginning of the period constitute the Board of Directors, including for this purpose any new director whose election resulted from a vacancy on the Board of Directors caused by the mandatory retirement, death, or disability of a director and was approved by a vote of at least two-thirds of the directors then still in office who were directors at the beginning of the period, cease for any reason to constitute a majority of the Board of Directors; (C) notwithstanding clauses (A) or (E) of this definition, the Company consummates a merger or consolidation of the Company with or into another corporation, the result of which is that the stockholders of the Company at the time of the execution of the agreement to merge or consolidate own less than 80% of the total equity of the corporation surviving or resulting from the merger or consolidation or of a corporation owning, directly or indirectly, 100% of the total equity of the surviving or resulting corporation; (D) the sale on one or a series of transactions of all or substantially all of the assets of the Company; (E) any person has commenced a tender or exchange offer, or entered into an agreement or received an option to acquire beneficial ownership of 50% or more of the total number of voting shares of the Company, unless the Board of Directors has made a reasonable determination that such action does not constitute and will not constitute a change in the persons in control of the Company; or (F) a change of control of the Company of such a nature that would be required to be reported in response to Item 6(e) of Schedule 14A of Regulation 14A promulgated under the Exchange Act other than in circumstances specifically covered by clauses (A) through (E) above. Section . Change of Control. If a Change of Control occurs, each Participant's Accounts will be distributed to the Participant (or, in the event of the Participant's death, to the Participant's Beneficiary) in a lump sum as soon as administratively feasible after the Change of Control.

Note: Internal Revenue Code Section 280G could impose certain, adverse tax
            consequences on both Participants and the Employer as a result of
            the application of Section 1.12. The Employer should consult with
            its attorney prior to selecting to apply Section 1. 06(c).

1.13  RELIANCE ON PLAN

      An adopting Employer may not rely solely on this Plan to ensure that the
      Plan is "unfunded and maintained primarily for the purpose of providing
      deferred compensation for a select group of management or highly
      compensated employees" with respect to the Employer's particular
      situation. This Agreement must be reviewed by the Employer's attorney
      before it is executed.

      This Adoption Agreement may be used only in conjunction with the
      CORPORATEplan for Retirement Executive Plan Basic Plan Document.


EXECUTION PAGE
(FIDELITY'S COPY)

IN WITNESS WHEREOF, the Employer has caused this Adoption Agreement to be executed this ________day of _______________, 20_______.

Employer __________________________________

By __________________________________

Title __________________________________

Employer __________________________________

By __________________________________

Title _______________________________


EXECUTION PAGE
(FIDELITY'S COPY)

IN WITNESS WHEREOF, the Employer has caused this Adoption Agreement to be executed this ________day of _______________, 20_______.

Employer _________________________

By _______________________________

Title ____________________________

Employer _________________________

By _______________________________

Title _______________________


ATTACHMENT A

PURSUANT TO SECTION 1.03(a), THE FOLLOWING ARE THE EMPLOYEES WHO ARE ELIGIBLE TO PARTICIPATE IN THE PLAN:

EMPLOYER

BY

TITLE

DATE

NOTE: The Employer must revise Attachment A to add Employees as they become eligible or delete Employees who are no longer eligible. Attachment A should be signed and dated every time a change is made.


ATTACHMENT B

(a) [ ] THE PARTICIPANT'S VESTED PERCENTAGE IN MATCHING CONTRIBUTIONS ELECTED IN SECTION 1.05(b) SHALL BE BASED UPON THE FOLLOWING SCHEDULE:










(b) [ ] THE PARTICIPANT'S VESTED PERCENTAGE IN EMPLOYER CONTRIBUTIONS ELECTED IN SECTION 1.05(c) SHALL BE BASED UPON THE FOLLOWING SCHEDULE:











EXHIBIT 31.01

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

I, William P. Greubel, certify that:

1. I have reviewed this Quarterly Report of Wabash National Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(c) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: April 29, 2005                  By: /s/ William P. Greubel
                                          ----------------------
                                          William P. Greubel
                                          President and Chief Executive Officer
                                          (Principal Executive Officer)

17

EXHIBIT 31.02

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

I, Robert J. Smith, certify that:

1. I have reviewed this Quarterly Report of Wabash National Corporation;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(c) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:  April 29, 2005                  By: /s/ Robert J. Smith
                                           ------------------------------------
                                           Robert J. Smith
                                           Senior Vice President and Chief
                                           Financial Officer

18

EXHIBIT 32.01

WRITTEN STATEMENT OF CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
PURSUANT TO SECTION 906
OF THE SARBANES-OXLEY ACT OF 2002 (18 U.S.C. SECTION 1350)

The undersigned, the Chief Executive Officer and the Chief Financial Officer of Wabash National Corporation (the "Company"), each hereby certifies that, to his knowledge, on April 29, 2005:

(a) the Form 10Q, Quarterly Report Pursuant to Section 13 or 15 (d) of the Securities and Exchange Act of 1934 of the Company for the quarter ended March 31, 2005 filed on April 29, 2005 with the Securities and Exchange Commission (the "Report") fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(b) information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

/s/ William P. Greubel
------------------------------------
William P. Greubel
Chief Executive Officer
April 29, 2005

/s/ Robert J. Smith
------------------------------------
Robert J. Smith
Chief Financial Officer
April 29, 2005

19