Why does a rear differential on an 89 ford van only rotate twice while the wheel turns once?
Why does a rear differential on an 89 ford van only rotate twice while the wheel turns once?
The differential doesn't rotate at all, do you mean the pinion shaft where the drive shaft is attached?
The gears in the differential gear down the final drive by some ratio. Exactly what depends on the model of vehicle, but it's usually around 3:1 final drive. Usually a lower ratio for a van or truck with a lower top speed.
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