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September 1, 1999 Service bulletin

Some vehicles that have had a rear axle ratio changes, gem module replaced, and / or tire size change may...

Ford technical service bulletin 6909 for 2000 Ford F-650 and 2000 Ford F-750.

Bulletin number
6909
Component
Power train
Summary
Some vehicles that have had a rear axle ratio changes, gem module replaced, and / or tire size change may have an inaccurate or inoperative speedometer. Tt

Owners of these vehicles have filed 2 complaints in the transmission category.

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