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Ford Defect Investigation RQ04007: FRACTURE OF THE STEEL WHEEL RIM
2005 Ford Crown Victoria
FRACTURE OF THE STEEL WHEEL RIM
- During a September 23, 2004 meeting and in subsequent discussions in November, Ford advised the Office Of Defects Investigation (ODI) of their plans to introduce an improved steel wheel for manufacturing and service component use on the subject vehicles, indicating this would occur in December 2004.the new wheel design incorporates an additional manufacturing process (shot peening) which lowers tensile stress in the surface layer of the rim material adjacent to the circumferential weld. Theoretically this should improve rim durability by reducing fatigue crack initiation sites.indications from Ford's accelerated testing methods show an improvement in the performance of the new wheel.in addition to prior safety recall 03V279 and service action (sa) 03M03, Ford will announce a new extended warranty sa for vehicles built prior to December 2004 that suffer rim fractures in service.the new wheel design will be used as a remedy.Ford advises that a sa is sufficient for addressing future wheel failures (including recall 03V279 remedy wheel failures) because: 1) failure rates are low based on Ford's analysis, and 2) driver warnings (repetitive slow air loss, and or steering wheel vibration) allow early and safe detection of cracked wheels.ODI has received 25 vehicle owner questionnaire (voq) reports (involving 22 vehicles) which allege a rim fracture of one or more steel wheels.about half the reports involve vehicles built with the remedy wheel used for recall 03V279, and most of the remaining vehicles were subject to the recall.the process of identifying pertinent Ford complaints is made difficult by Ford's prior recall and warranty program activities.the manufacturer complaint and warranty counts, which primarily involve failures of recall 03V279 remedy wheels, are based on analysis conducted to date and are considered to be conservative.further investigation is required, thus ODI is upgrading this investigation to an engineering analysis (ea).during the ea, pertinent failure reports and consequences will be identified and reviewed.ODI and Ford will discuss details for conducting an audit analysis of failed wheels replaced under the new sa.additionally, ODI is awaiting Ford's lab analysis of two wheels which were the subject of voq reports, one of which was involved in the noted crash event.a determination will be made as to whether Ford's service action is sufficient for addressing ongoing rim fractures.
- Documents (11)
- CUSTOMER SATISFACTION CAMPAIGNS AND OWNER NOTIFICATION LETTERS PERTAINING TO RQ04-007 AND EA04-034 INVESTIGATIONS. [DATED DECEMBER 2004]. * 04/15/11 * P
- OPENING RESUME APPROVED * 08-02-04 * P
- CLOSING RESUME APPROVED
- FORD RESPONSE ONE CD -APPENDIX_C & NHTSA PRESENTATION.
- MEMO TO FILE * 09/23/2004 * P
- OPENING RESUME APPROVED
- MFR IR RESPONSE DATA
- MFR IR RESPONSE LETTER
- MEMO TO FILE - 2 CD FORD RESPONSE - ONE CD APPENDIX A, B, C, D, E, I, J; ONE CD APPENDIX F
- MFR IR RESPONSE LETTER
- IR TO MFR * 08-04-04 * P
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