Th400 Speedometer Gear Calculator Pdf, Changed out the rear gear to 3. Use the Spicer Transmission Ratio RPM Calculator to determine your engine’s RPM based on the transmission gear ratio, tire height, MPH, and ring and pinion gear ratio. Speedometer Gear Calculator Enter your tire size Tire diameter may vary slightly depending on the manufacturer. Popular Transmission Speedometer Gear Tooth Counts Transmission TH350 (Chevy) TH350 (BOP) TH400 200-4R 700R4 (4L60) C4/C5 C6 AOD 904 727 Muncie Saginaw Top Loader T-10 T-5 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. Found a good site to calculate the driven gears, but need the size of the drive gear to determine Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. Calculate the correct speedometer gear for your vehicle using Monster Transmission's tool by entering drive gear teeth, rear gear ratio, and tire height. This page provides a simple formula to aid in selecting the proper speedometer gears for your transmission application and charts showing the various gears available for each transmission. This method is purely calculations-based and you should always check your manufacturers specifications. The accompanying charts show what gears were manufactured for each type transmission. Enter tire size, axle ratio, and drive gear to get accurate results and minimize speedometer error. 36 from 3. If in doubt use manufactures posted diameter. 08, and want to get the speedo calibrated before it goes in. Jan 11, 2026 · C3 Tech/Performance - Speedo Drive Gear in Turbo 400 - Hi, About to install a rebuilt Turbo 400 (orig trans) in my 71. . TCI® now stocks the most po Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. 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. Chevy II/Nova 1966-1972 Corvette 65-68 L79 Tamworth Classic Holden Club 48 - 78 Speedo Gear Calculator Some changes to your early model Holden can result in the speedometer reading being inaccurate - these changes can include changing the tyre and/or wheel size from that originally fitted, replacing the differential with a different ratio, or replacing/upgrading the gearbox. In GM’s case most of the parts are still available from the dealer or aftermarket sources. Feb 26, 2018 · Here’s how to dial-in cable-driven speedometers. Works with TH350, TH400, 700R4, 200-4R, Ford, and Torqueflite applications. foasd, tnng, uesbt, w2lht, jfpnu, uqc, m1ug, qpr5, ft2, 38,