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 quarterlyreport on Form 10-Q of Metaldyne Corporation; |

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| 2.  | Based on my knowledge, this reportdoes not contain any untrue statement of a material fact or omit tostate a material fact necessary to make the statements made, in lightof 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 financialstatements, 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; |

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| 4.  | The registrant's other certifying officerand I are responsible for establishing and maintaining disclosurecontrols and procedures (as defined in Exchange Act Rules 13a-15(e) and15d-15(e)) for the registrant and have: |

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|  | a)  | Designed such disclosure controlsand procedures, 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 anychange in the registrant's internal control over financialreporting that occurred during the registrant's most recentfiscal quarter that has materially affected, or is reasonably likely tomaterially affect, the registrant's internal control overfinancial reporting; and |

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| 5.   | Theregistrant's other certifying officer and I have disclosed, basedon our most recent evaluation of internal control over financialreporting, to the registrant's auditors and to the auditcommittee of the registrant's board of directors (or personsfulfilling the equivalent function): |

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|  | a)  | All significant deficiencies andmaterial weaknesses 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)  | Anyfraud, whether or not material, that involves management or otheremployees who have a significant role in the registrant'sinternal control over financial reporting. |

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| Date:May 18, 2005 |  |   |  | /s/ Jeffrey M.Stafeil                                                                                                   |
|              |  |   |  | JeffreyM. StafeilExecutive Vice President and Chief FinancialOfficer (Chief Accounting Officer and AuthorizedSignatory) |
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