FDR has various meanings in the Gear category. Discover the full forms, definitions, and usage contexts of FDR in Gear.
This is the ratio that describes the difference between the number of times the driveshaft must turn before the axle shaft turns once. In a final drive ratio of 3.55:1, for example, the driveshaft must turn 3.55 times before the axle will turn once. The number of teeth on the ring and pinion gears determine the ratio.
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