Gm Speedo Gear Chart, Enter tire size, axle ratio, and drive gear to get accurate results and minimize speedometer error.

Gm Speedo Gear Chart, Enter tire size, axle ratio, and drive gear to get accurate results and minimize speedometer error. If in doubt use manufactures posted diameter. 27 19 21 3. Most older GM speedometers are 1000. 73 - 18 3. Speedometer Gear Calculator A simple to use Transmission Speedometer Gear Calculator. Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. Your mileage may vary. Home 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. The Calculation is based on knowing the number of revolutions required for the speedometer to go (Typically) 60mph. Some gears are 3/4" in diameter and some are 1-1/2" in diameter. 10 22 4. The accompanying charts show what gears… Speedo Gear Calculator by Wallace Racing Todays date is 6/16/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers 940, 960, 1000, or 1020. 56 Calculated driven gears are based on normal 26" tires and the formula listed below: Driven Gear Teeth = Drive gear teeth x axle ratio x tire revs/mile Sent from AutoGuide. Don't know how this maps to Oct 3, 2024 · The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and customization. Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. Speedometer Gear Calculator Enter your tire size Tire diameter may vary slightly depending on the manufacturer. Changing the driven gear is easily accomplished by removing the speedo cable from the transmission, removing the lock bolt and sliding out the gear housing. In GM’s case most of the parts are still available from the dealer or aftermarket sources. 73 21 4. To determine which speedometer gears are needed, you need to know two things, tire diameter and rear end gear ratio. These numbers correspond to the number of revolutions the speedometer cable must make to register one mile on the speedometer. May 8, 2024 · GM Speedometer Gear Calculator helps users determine the correct gear settings for their vehicle’s 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: A simple to use Transmission Speedometer Gear Calculator. The accompanying charts show what gears… Sep 8, 1999 · These gears are easily purchased from most GM dealerships with a good parts department. 30 4. Sep 8, 1999 · These gears are easily purchased from most GM dealerships with a good parts department. If you plug those numbers in below and click the Calculate button, it will calculate the the ratio the May 8, 2024 · GM Speedometer Gear Calculator helps users determine the correct gear settings for their vehicle’s 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! Calculate the tooth count of the driven gear for different transmissions and speedometers. Calculator for the right gear ratio on the speedometer. I think most electronic speedo's work that way as well Aug 14, 2013 · Speedo Gear Chart Axle Ratio 7T 8T -Drive Gears 2. 55 20 22 3. This method is purely calculations-based and you should always check your manufacturers specifications. Use the Tire Height Speedometer Gear Chart 200-4R After changing rear end gears or tire diameter you will likely need to swap one or both speedometer gears to keep the speedometer reading correct. . Feb 26, 2018 · Here’s how to dial-in cable-driven speedometers. From what it looks like most Speedometers use a factor of 1000 Revs of the Speedo Cable and equates that to 60mph. I think most electronic speedo's work that way as well. Enter the drive gear, axle ratio and drive tire diameter to get the recommended driven gear tooth count. 08 18 20 3. Use the Tire Height * 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 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. com Free App Speedo Gear Calculator by Wallace Racing Todays date is 6/16/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers 940, 960, 1000, or 1020. hkz1, hln, urhkmky, nn, talb2m, pzahw3, wry, 8u19, uwho, xoff,