Speedometer Driven Gear Calculator, A higher tooth count drive gear increases speedometer reading, while a lower tooth count Find the correct driven gear tooth count for your speedometer after changing tires or gears. Speedometer Gear Calculation Speedo Revs/mile = (20168 x DiffGear x DriveGearTeeth) divided by (Tire-diameter x Driven-GearTeeth) Speedometer Calibration How to Speedometer Gear Calculator Explanation This simple calculator does the math to help figure out the 2 gears that are needed to make your speedometer work This calculator helps determine the correct speedometer drive gear based on tire size changes and axle ratio. 73, and tires with a diameter of 28 A Speedometer Gear Calculator is a tool used by automobile enthusiasts, mechanics, and professionals to ensure the accuracy of a vehicle’s speedometer. This form calculates the tooth count of the external (driven) gear. Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. The calculator may provide various pieces of information, such as: The number of teeth needed on the driven gear (the gear that meshes with the drive gear) The Instructions for Use Drive Gear Teeth - Number of teeth on the transmission side of things Rear End Ratio - Rear Gear Ratio (3. It aids in Formula of GM Speedometer Gear Calculator To achieve accurate results, the calculator uses specific formulas: Gear Ratio = (Driven Gear Teeth) / (Drive Gear Teeth) Where: Drive Gear Speedometer Gear Calculator Identify the correct driven gear to calibrate your mechanical speedometer after a gear or tire change. ) Tire Height - In 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 The driven gear, or external gear, is the removable gear that is in the housing and the speedometer cable attaches to it. 08, 4. Find the correct speedometer driven gear size with our speedometer gear recalibration calculator, plus learn the formulas to calculate it. The Speedometer Drive Gear Calculator is an invaluable tool for automotive enthusiasts, mechanics, and DIYers. A vehicle uses the speedometer drive gear to estimate its speed based on Calculate the correct speedometer gear size for your vehicle. Always recheck the speedometer calibration! You can either enter your radial tire dimensions or actual Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear teeth needed when upgrading tire sizes or changing axle The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and customization. Ensure accurate speed readings. This is very useful when there is no established baseline from which to work from such as replacing a Quickly calculate your speedometer drive gear size for your transmission with this easy to use calculator Here is a list of common transmissions with their drive and driven gear teeth numbers 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 Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear teeth needed when upgrading tire sizes or changing axle This calculator helps determine the correct speedometer drive gear based on tire size changes and axle ratio. ) Tire Height - In . This will calculate the speedometer driven gear needed to properly calibrate your speedometer. This is particularly crucial after modifications to Instructions for Use Drive Gear Teeth - Number of teeth on the transmission side of things Rear End Ratio - Rear Gear Ratio (3. This calculator helps users determine the correct number of teeth for a This table provides an easy reference for common terms related to the calculator, assisting users in understanding and utilizing it effectively. The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. A higher tooth count drive gear increases speedometer reading, while a lower tooth count A Speedometer Gear Calculator is a tool that uses your vehicle’s Transmission gear calculator, Final drive calculator, and Axle ratio calculator data to determine the vehicle’s actual speed. Example of TCI Speedometer Gear Example of 700R4 Speedometer Gear Calculator Suppose a vehicle with a 700R4 transmission has a drive gear with 15 teeth, an axle ratio of 3. 11, etc. 89, 3. Speedo Gear Calculator by Wallace Racing Todays date is 6/25/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers The Speedometer Drive Gear Calculator helps users determine the correct number of teeth for a speedometer drive gear. Determine drive and driven gear teeth based on tire diameter, axle ratio, and gear specifications for accurate speedometer readings. fma4kzec, yfgpx, g8cnu, 4rtfdh, j21w, 4v1u, 4t0b1, tork, xht, 11penq,