UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13G


                    Under the Securities Exchange Act of 1934
                                (Amendment No. )*

                           Wabash National Corporation
                                (Name of Issuer)

                                  COMMON STOCK
                         (Title of Class of Securities)

                                    929566107
                                 (CUSIP Number)

                                December 31, 2002
             (Date of Event which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

                               |X| Rule 13d-1 (b)
                               |_| Rule 13d-1 (c)
                               |_| Rule 13d-1 (d)

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for any  subsequent  amendment  containing  information  which  would  alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).

1. NAME OF REPORTING PERSON
         S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                  EIN 23-2856392
                  Schneider Capital Management Corporation




2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

                                             (a) |_|
                                             (b) |_|

3. SEC USE ONLY

4. CITIZENSHIP OR PLACE OF ORGANIZATION
                  PENNSYLVANIA

NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH

5. SOLE VOTING POWER 1,482,700

6. SHARED VOTING POWER None

7. SOLE DISPOSITIVE POWER
           1,482,700

8. SHARED DISPOSITIVE POWER
           None

9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
           1,482,700

10.CHECK BOX IF THE AGGREGATE  AMOUNT IN ROW (9) EXCLUDES CERTAIN
     SHARES |_|

11.PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
          5.8%

12.TYPE OF REPORTING PERSON
          IA


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                              GENERAL INSTRUCTIONS

Item 1.

(a)      Name of Issuer
                   Wabash National Corporation

(b)      Address of Issuer's Principal Executive Offices

                   1000 Sagamore Parkway South
                   Lafayette, Indiana 47905

Item 2.

(a)      Name of Person Filing
                           SCHNEIDER CAPITAL MANAGEMENT CORPORATION

(b)      Address  of  Principal  Business  Office or, if none, Residence
                           460 E. Swedesford Rd., Suite 1080
                           Wayne, PA 19087

(c)      Citizenship
                           UNITED STATES

(d)      Title of Class of Securities
                           COMMON STOCK

(e)      CUSIP Number
                           929566107

Item 3.  If this statement is filed pursuant to ss.ss.240.13d-1(b), or
         240.13d-2(b) or (c), check whether the person filing is a:

(a)     |_| Broker or dealer  registered  under Section 15 of the Act

(b)     |_| Bank as defined in section 3(a)(6) of the Act

(c)     |_| Insurance  company as defined in section 3(a)(19)of the Act

(d)     |_| Investment company registered under section 8 of the Investment
            Company Act of 1940

(e)     |X| An investment adviser in accordance with ss.240.13d-1(b)(1)(ii)(E)

(f)     |_| An employee  benefit  plan or  endowment  fund in accordance with
            ss.ss.240.13d-1(b)(1)(ii)(F)


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(g)     |_| A parent  holding  company,  in  accordance  with
            ss.ss.240.13d-1(b)(1)(ii)(G)

(h)     |_| A savings  association as defined in Section 3(b)
            of the Federal Deposit Insurance Act

(i)     |_| A church plan that is excluded from the definition of an investment
            company under Section 3(c)(14) of the Investment Company Act of 1940

(j)     |_| Group, in accordance with ss.ss.240.13d-1(b)(1)(ii)(H)

Item 4. Ownership.

     (a)  Amount Beneficially Owned
                    1,482,700

     (b)  Percent of Class
                    5.8%

     (c)  Number of shares as to which such person has:

          (i)   sole  power  to vote or to  direct  the vote
                    1,482,700
          (ii)  shared  power to vote or to direct  the vote
                    None
          (iii) sole power to dispose or to direct the disposition of
                    1,482,700
          (iv)  shared  power to dispose or to direct the disposition of
                    None

Item 5.  Ownership of Five Percent or Less of a Class If this statement
         is being filed to report the fact that as of the date hereof the
         reporting person has ceased to be the beneficial owner of more than
         five percent of the class of securities, check the following |_|.

Item 6.  Ownership of More than Five Percent on Behalf of Another Person.
             None

Item 7.  Identification and Classification of the Subsidiary Which Acquired the
         Security Being Reported on By the Parent Holding Company.
             N/A

Item 8.  Identification and Classification of Members of the Group.
             N/A

Item 9.  Notice of Dissolution of Group.
             N/A

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Item 10. Certification. By signing below I certify that, to the best
         of my knowledge and belief, the securities referred to above were
         acquired in the ordinary course of business and were not acquired for
         the purpose of or with the effect of changing or influencing the
         control of the issuer of the securities and were not acquired and are
         not held in connection with or as a participant in any transaction
         having that purpose or effect.

                                    SIGNATURE

         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this statement is true,  complete and
correct.

                                                February 12, 2003
                                                Date

                                                /s/ Gary P. Soura, Jr.
                                                ----------------------
                                                Signature

                                                GARY P. SOURA, JR.
                                                SR. VICE PRESIDENT
                                                Name/Title

         The original  statement  shall be signed by each person on whose behalf
the  statement is filed or his  authorized  representative.  If the statement is
signed  on behalf of a person by his  authorized  representative  other  than an
executive  officer or general  partner of the  filing  person,  evidence  of the
representative's  authority to sign on behalf of such person shall be filed with
the  statement,  provided,  however,  that a power of attorney  for this purpose
which is already on file with the Commission may be  incorporated  by reference.
The name and any title of each person who signs the statement  shall be typed or
printed beneath his signature.

         Attention:  Intentional misstatements or omissions of fact constitute
         Federal criminal violations (See 18 U.S.C. 1001)

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