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The Spicer Gear Ratio Calculator will assist you in determining the ratio between the ring gear and pinion gear in the differential housing in the rear end axle of a vehicle.
The rear end axle is responsible for transmitting power to the rear wheels in a rear-wheel-drive vehicle.
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The rear end axle is responsible for transmitting power to the rear wheels in a rear-wheel-drive vehicle. The calculation uses the number of teeth in the ring gear and divides it by the number of teeth in the pinion gear to provide you with a “[result] to 1” ratio.
For example, if the pinion gear has 41 teeth, and the ring gear has 11 teeth, the ratio would be calculated as 41/11, which is equal to 3.73 = 3.73:1.
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These tools provide mathematical calculations only. The instructional videos are intended only to provide guidance on how the calculators operate and are illustrative only. Neither the calculators nor the associated videos are intended to provide advice or information on vehicle operation, maintenance or safety. Dana makes no representation as to what equipment or use is appropriate for any specific vehicle.
