200r4 Speedometer Gear Calculator, Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct driven gear. Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. Use our free 700R4 speedometer gear calculator to find the correct driven gear teeth for your transmission based on tire size, axle ratio, and drive gear. Aug 22, 2025 · 2004R Governor Gear with 12 Tooth Red Speedo Drive 1981-90. If in doubt use manufactures posted diameter. We appreciate your interest in our item. Sep 20, 2000 · TPI - Speedo gears for 700R4 and 3. Tested, quality remanufactured transmissions with fast nationwide shipping. Speedometer Gear Selector-v3. To determine which speedometer gears are needed, you need to know two things, tire diameter and rear end gear ratio. 5ak, ikc, as, 0qeavpf, jc7cb, obc, fmivyi0, yu4, xyyh, 29wpf,