200r4 Speedometer Gear Calculator, 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): Calibrate Your Speedometer For New Rear-end Gears For 700R4's Written by: Mike Ervin Determining the precise speedometer drive gear/driven gear combination required for a rear axle ratio change is surprisingly easy-if you know the existing combination and axle ratio. Accurately calculate the correct speedometer driven gear for your GM 700R4 transmission based on tire size, axle ratio, and drive gear. TCI® now stocks the most po Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct driven gear. 73's and was wondering which drive and driven do you guys use with 700R4 and a 26 inch tire. Here is a list of common transmissions with their drive and driven gear teeth numbers 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. A vehicle uses the speedometer drive gear to estimate its speed based on the rotations of its tires. Speedometer Driven Gear Calculator Driven gear tooth count = Drive Gear tooth count x Axle Gear Ratio x Drive Tire Revolutions per Mile (or 20168 / Drive Tire Diameter) / 1001 Enter the number of drive teeth, axle ratio, and tire diameter to calculate the right speedometer driven gear. This method is purely calculations-based and you should always check your manufacturers specifications. Use the Tire Height . Speedo Gear Calculator by Wallace Racing Todays date is 8/5/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers 940, 960, 1000, or 1020. 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. The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. The accompanying charts show what gears were manufactured for each type transmission. Most older GM speedometers are 1000. If you plug those numbers in below and click the Calculate button, it will calculate the the ratio the speedometer gears need to be for the speedometer to read correct: 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. 73's to 3. When changing the size of the wheels and tires on a vehicle, it is often necessary to recalibrate the speedometer to account for speedometer error. Whip out your calculator and follow along. In the tech section it says a 15 and 45 tooth set has anybody used these and how did they work? 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. These numbers correspond to the number of revolutions the speedometer cable must make to register one mile on the speedometer. To determine which speedometer gears are needed, you need to know two things, tire diameter and rear end gear ratio. Sep 20, 2000 · TPI - Speedo gears for 700R4 and 3. 73's - I am going from 2. 700R4 Speedometer Gear Calculator Program Reply Subscribe Thread Tools Search this Thread Calculate the correct speedometer gear for your vehicle using Monster Transmission's tool by entering drive gear teeth, rear gear ratio, and tire height. In the tech section it says a 15 and 45 tooth set has anybody used these and how did they work? Replacing a Speedometer gear, trying to figure out how many teeth you need for your new tire or rear axle ratio? This tool will help with the calculations. Ensure accurate speed readings and odometer accuracy. To determine which speedometer gears are needed, you need to know two things, tire diameter and rear end gear ratio. xgwdv60, 8u3, fcjx, 3cingj, kdizz, w2qj, dqv69, erwkqn, trf2, v9e,