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August 1, 1998 Service bulletin

Brief information on vehicles exhibit vibration at cruise over 50 mph

Ford technical service bulletin 4631 for 1997-1998 Ford F-150, 1997-1998 Ford Expedition and 1997-1998 Ford F-250 and others.

Bulletin number
4631
Component
Power train
Summary
Brief information on vehicles exhibit vibration at cruise over 50 MPH. Tt

Owners of these vehicles have filed 432 complaints in the transmission category.

Vehicles covered

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