July 1, 1999 Service bulletin

Some vehicles with model 80 rear axles only may exhibit a concern with the amount of sound, whine produced...

Ford technical service bulletin 6599 for 1996-1999 Ford E-450, 1996-1999 Ford E Series and 1996-1999 Ford E-Super Duty.

Bulletin number: 6599
Component: Power train: axle assembly
Summary: Some vehicles with model 80 rear axles only may exhibit a concern with the amount of sound, whine produced above 35 MPH.

Owners of these vehicles have filed 8 complaints in the transmission category.

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