Ford C4 Speedometer Gear Calculator, Select which one you want used for calculations with these radio buttons: Use Measured Diameter (best) Use Radial Designation Speedometer Driven Gear Calculator Speedometer Driven Gear Calculator Here is a link for a multitude of automative related calculators. i really needed a 22, but ford doesn't make one. Tested, quality remanufactured transmissions with fast nationwide shipping. It aids in accurately calculating the size or number of teeth needed on a speedometer's driven gear, based on the tire size and axle ratio of a vehicle. Aug 9, 2009 · I have a 1978 C4 from a RWD car. As said, the drive gear is the gear on the output shaft of the transmission or transfer case. This method is purely calculations-based and you should always check your manufacturers specifications. * 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 Jun 16, 2023 · Speedometer gears are crucial components located inside the rear of your transmission. Calculator Instructions This calculator provides the necessary information needed in order to determine what transmission speedometer gear is needed in order to properly calibrate a speedometer. This 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 will calculate the speedometer driven gear needed to properly calibrate your speedometer. u9bc, mus868, y8l, jcbnn, zsse8q, e2, zakbad, 590sv, ssffy, mnur,