Exhibit31.2

Certification Pursuant To Section 302 Of TheSarbanes-Oxley Act Of 2002 (Chapter 63, Title 18 U.S.C. Section1350(A) And (B))

I, Jeffrey Stafeil, certify that:

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| 1.  | I have reviewed this quarterly report on Form 10-Q ofMetaldyne Corporation; |

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

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| 3.  | Based on my knowledge, the financial statements, and otherfinancial information included in this report, fairly present in allmaterial respects the financial condition, results of operations andcash flows of the registrant as of, and for, the periods presented inthis report; |

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| 4.   | The registrant's other certifyingofficer and I are responsible for establishing and maintainingdisclosure controls and procedures (as defined in Exchange Act Rules13a-15(e) and 15d-15(e)) for the registrant and have: |

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|  | a)  | Designed such disclosure controls andprocedures, or caused such disclosure controls and procedures to bedesigned under our supervision, to ensure that material informationrelating to the registrant, including its consolidated subsidiaries, ismade known to us by others within those entities, particularly duringthe period in which this report is being prepared; |

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|  | b)  | Evaluated the effectiveness of theregistrant's disclosure controls and procedures and presented inthis report our conclusions about the effectiveness of the disclosurecontrols and procedures, as of the end of the period covered by thisreport based on such evaluation;and |

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|  | c)  | Disclosed in this report any change inthe registrant's internal control over financial reporting thatoccurred during the registrant's most recent fiscal quarter thathas materially affected, or is reasonably likely to materially affect,the registrant's internal control over financial reporting;and |

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| 5.   | The registrant's other certifying officerand I have disclosed, based on our most recent evaluation of internalcontrol over financial reporting, to the registrant's auditorsand the audit committee of the registrant's board of directors(or persons fulfilling the equivalent function): |

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|  | a)  | All significant deficiencies and materialweaknesses in the design or operation of internal control overfinancial reporting which are reasonably likely to adversely affect theregistrant's ability to record, process, summarize and reportfinancial information; and |

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|  | b)  | Any fraud,whether or not material, that involves management or other employeeswho have a significant role in the registrant's internal controlover financial reporting. |

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| Date:November 10, 2004 |  | /s/ Jeffrey M.Stafeil                                        Jeffrey M. Stafeil Executive Vice President and Chief FinancialOfficer(Chief Accounting Officer and AuthorizedSignatory) |
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