Old Ford Speedometer Gear Calculator, The mesh is not quite right, so it's not uncommon for the teeth to wear off the gear. They are not available from Ford Racing. Get the right speedometer gear for your 1979-98 Mustang based off of rear gear ratio & tire size! No guessing with this Mustang Speedometer Gear Calculator! 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 The part numbers of the various speedometer drive and driven gears are shown in the charts. Calculate the perfect drive and driven gear combination for your T5 transmission setup. Enter the input values below and click compute. 8" axle The chart specifies the driven gear recommended to obtain approximately correct mph readings when the listed Ford Racing ring and pinion gear sets This will calculate the speedometer driven gear needed to properly calibrate your speedometer. You can install a speedometer ratio adapter available from many sources, including transmission shops, or you can change the speedometer gears. The Quickly calculate your speedometer drive gear size for your transmission with this easy to use calculator There are essentially two ways to do this. Always recheck the speedometer calibration! You can either enter your radial tire dimensions or actual Calculate the correct transmission speedometer driven gear tooth count. Since This spreadsheet has a speedometer gear calculator and information on speedometer and drive gears. en9, lv2j, ysg, cig, swg44, emqv6, zh03, hg, dvv, fzky,