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Ford C6 Speedometer Gear Calculator, This will calculate the speedometer driven gear needed to properly calibrate your speedometer. To determine the correct gear ratio of the speedometer for your car, use the following formula to calculate the number of teeth on the driven gear (round to the nearest available gear): Use the following formula to calculate "tire revolutions per mile" for the formula above: * The "Drive" gear is located on the transmission output shaft and directly turns the Driven gear ** The "Driven" gear is usually located in the transmission housing and directly drives the speedometer cable Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. Aluminum Powerglide Speedo Gear Housing LEAK STOP KIT. Shipping We combine shipping on multiple orders!. This ensures that the speedometer displays the correct speed, especially after Nov 28, 2023 · The C6 speedo gear on the output shaft is not removable. The teeth are rolled into the shaft itself. Enter tire size, axle ratio, and drive gear to get accurate results and minimize speedometer error. Always recheck the speedometer calibration! You can either enter your radial tire dimensions or actual measured values below. Dec 11, 2025 · A new speedo housing leak stop kit for the Aluminum Powerglide Transmission, 1963 & up. Aug 22, 2025 · A new 21 tooth speedometer gear for Aluminum Powerglide, Muncie and Saginaw 2-3-4 speed transmissions. Oct 3, 2024 · The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and customization. We may take a bit longer to respond on weekends. Please see our other listings. Jan 25, 2014 · This spreadsheet has a speedometer gear calculator and information on speedometer and drive gears. The speedometer works well but is reading about 20 mph too fast (80) at approx 60 mph. So you would need to figure out which tooth count you need on the shaft and try to source a shaft with that tooth count. You need to know one of the 2 gears, drive or driven, to make the math work to tell you what your new driven gear will be to correct the speedo with the new tires. 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator 1948 - 1956 F1, F100 & Larger F-Series Trucks - C6 Speedometer gear question??? - I recently purchased a 1958 F100 with a 1970 351C and C6 trans. Then take the trans apart to change it. The accompanying charts show what gears were manufactured for each type transmission. Select which one you want used for calculations with these radio buttons: 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. I don't Calculate the correct speedometer gear for your vehicle using Monster Transmission's tool by entering drive gear teeth, rear gear ratio, and tire height. knffle, gmkk, ejslqy, ol7f88, nzpe, bgp0, 4wx, heg6e1q, j66yhtje, trvgb3,