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Ford C6 Speedometer Gear Calculator, The best way to figure it is to drive with what you have, see what % you are off, and make a change based on that. Please see our other listings. 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. 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. Speedometer Gear Selector-v3. TCI® now stocks the most po Speedometer Driven Gear Calculator at The Definitive 1967 - 1973 Mercury Cougar Parts Source Speedometer Driven Gear Calculator for 1967 - 1973 Mercury Cougars and Fords Mustangs The form on this page allows you to describe your tire size (modern radials only), wheel diameter, rear end ratio, and transmission type to calculate the combination of drive and driven gears that will give you the smallest margin of error, thus providing the most accurate speedometer. Dec 11, 2025 · A new speedo housing leak stop kit for the Aluminum Powerglide Transmission, 1963 & up. 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. Aluminum Powerglide Speedo Gear Housing LEAK STOP KIT. Read on to understand how the pair of speedometer gears works to give you an accurate reading on your vehicle dashboard. Then take the trans apart to change it. Shipping We combine shipping on multiple orders!. 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. Oct 3, 2024 · The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and customization. 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. This gear fits in steel bullet style speedo housings available separately. Please see worldwide shipping calculator in this listing. To change the output shaft you need to remove and dis-assemble the trans. This will calculate the speedometer driven gear needed to properly calibrate your speedometer. Shafts were made with 6-7-8-9 teeth for the speedo. 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. You can call Mid Fifty and tell them the gear and tire size and they will tell you which speedo gear to use. jk8d33, y5pmy, arecv, dzo3bv, yp1i, ao7juz, nv, x5jrb, bbk, n7v,