Speedometer Calculator Gear Ratios, Calculate the correct speedometer driven gear based on tire size, axle ratio, and drive gear.

Speedometer Calculator Gear Ratios, Check Compare and enter alternate Tire Diameter or Diff Ratio. The speedometer gear calculator helps you out with the size or number of teeth on the gear you need based on the size of the tire. TCI® now stocks the most po Apr 11, 2026 · Gear Ratio Speedometer Calculator Calculate speedometer correction, actual vehicle speed, and required speedometer gear teeth for any tire size or axle ratio change. Most older GM speedometers are 1000. TRANS-01, Speedometer, Gear Ratio, and Tire Size Calculator Acrobat Printable Version These calculations will not only help you determine your speedometer error, but will also help you determine your maximum speed in any gear for a given gear set. Say, for example, you need to calculate the gear ratio for bigger tires. Use our advanced speedo drive gear calculator to determine the correct speedometer driven gear for accurate speed and odometer readings after tire, axle, or transmission changes. Stop guessing and avoid speeding tickets with precise speedometer calibration. Edit gear ratios, or enter (and save) multiple ratio sets, then click Compare Ratios to display multiple graphs and compare. The following formula will work for any GM, Ford or Chrysler vehicle and is very useful when there is no established baseline from which to work from such as replacing a transmission in a vehicle that was purchased without a drive line. up, kcp, aj, sjzl, bkwaa, bn, c2e, de, ikwx, tps,