EXHIBIT 99.1


                                  CERTIFICATION
            PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
              (CHAPTER 63, TITLE 18 U.S.C. Section 1350(a) AND (b))


Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Chapter 63, Title 18
U.S.C. Section 1350(a) and (b)), each of the undersigned hereby individually
certifies in his capacity as an officer of Metaldyne Corporation (the "Company")
that the Quarterly Report of the Company on Form 10-Q for the period ended
September 29, 2002 fully complies with the requirements of Section 13(a) of the
Securities Exchange Act of 1934 and that the information contained in such
report fairly presents, in all material respects, the financial condition and
results of operations of the Company at the end of and for the periods covered
by such Report.

Dated: November 13, 2002                   /s/ TIMOTHY D. LEULIETTE
                                           ------------------------
                                           Timothy D. Leuliette
                                           Chief Executive Officer

The foregoing certification is being furnished solely pursuant to Section 906
of the Sarbanes-Oxley Act of 2002 (Chapter 63, Title 18 U.S.C. Section 1350(a)
and (b)), is not a part of the Form 10-Q to which it refers and is, to the
extent permitted by law, provided by each of the above signatories to the
extent of his respective knowledge.