Rearend Gear Ratios Drive Ratio Equation
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To calculate the drive ratio for a quick-change, divide the number of teeth in the top gear by the number of teeth in the bottom gear for the QC ratio and multiply that number by the axle ratio (ring-and-pinion ratio of the QC rearend). For OE rearends, divide the number of teeth in the ring gear by the number of teeth in the pinion gear for the drive ratio. View Related Article
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