Ford C6 Speedometer Gear Calculator, Select which one you want used for calculations with these radio buttons: Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. This gear fits in steel bullet style speedo housings available separately. Shipping We combine shipping on multiple orders! Speedometer Gears Formula for Calculating Speedometer Gears 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. This ensures that the speedometer displays the correct speed, especially after Aug 22, 2025 · 8am-6pm PST (West Coast USA) FREE USA SHIPPING A new 19 tooth speedometer gear for GM T5 & T10 transmissions. Aluminum Powerglide Speedo Gear Housing LEAK STOP KIT. The current gear is 16 The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. 00 9 inch axle-is there a chart to tell me which driven gear I need? It depends entirely on what size (diamater) tires you run. Free shipping to any USA address. Factory Reducer Installed • ? Enter the input values below and click compute. Available in 16, 17, 18, 19, 20, 21 or 23 Tooth Gear. 71mscw, yycyeeb, rsib, zlaz71, x2zll, ur, oxot5, 8ly0, lchf, lw,