EXHIBIT 32.2
                                             CERTIFICATION PURSUANT TO
                                              18 U.S.C. SECTION 1350,
                                              AS ADOPTED PURSUANT TO
                                   SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Quarterly Report of Navistar International Corporation (the "Company") on Form 10-Q for
the period ended July 31, 2003 as filed with the Securities and Exchange Commission (the "SEC") on the date
hereof (the "Report"), I, Robert C. Lannert, Chief Financial Officer of the Company, certify, pursuant to 18
U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1)      The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act
         of 1934; and

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

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been
provided to the Company and will be retained by the Company and furnished to the SEC or its staff upon request.


/s/ Robert C. Lannert
    Robert C. Lannert
    Chief Financial Officer
    September 12, 2003


This certification accompanies the Report pursuant to § 906 of the Sarbanes-Oxley Act of 2002 and shall not be
deemed filed by the Company for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or
otherwise subject to the liability of that section.  This certification shall also not be deemed to be
incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Securities
Exchange Act of 1934, as amended, except to the extent that the Company specifically incorporates it by reference.
















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