Speedometer Drive Gear Calculator, 8" axle The chart specifies the driven gear recommended to obtain approximately correct mph readings when the listed Ford Racing ring and pinion gear sets Use this simple Gear Ratio Calculator to determine your gear ratio and vehicle’s speed in any gear and any engine RPM for best performance. Always recheck the speedometer calibration! You can either enter your radial tire dimensions or actual Example of GM Speedometer Gear Calculator Let’s walk through a practical example using the GM Speedometer Gear Calculator. Then take your car The Speedometer Gear Calculator is an ingenious tool that simplifies the process of calculating your speedometer gear. com/tc/speedometermore Swapping in a different gear set? This is more than likely going to throw off your speedometer. 73, Understanding Speedometer Gear Calculation The speedometer gear calculation involves determining the appropriate size of the driven gear based on the tire diameter, axle ratio, and the number of teeth What speedo gears should I buy? Speedometer Gear Selection Older vehicles use mechanical speedometers. Compare available gears before changing your cable setup safely. Speedo Gear Calculator by Wallace Racing Todays date is 7/4/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers Speedo Gear Calculator by Wallace Racing Todays date is 7/4/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers Understanding Speedometer Gears The speedometer in your vehicle works through a mechanical or electronic system that measures the rotation of your wheels and converts it to a speed reading. Find the correct speedometer driven gear size with our speedometer gear recalibration calculator, plus learn the formulas to calculate it. The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. These changes often lead to an inaccurate Calculate the correct transmission speedometer driven gear tooth count. And the Driven Gear tab lists the driven gears used for each axle ratio, specific transmission, and tire size. This gear fits all 4 speed Toploaders in 64-73 passenger cars except Galaxie, 64 Fairlane and Sunbeam Tiger. We have tried to compile a gear selec on that will work for most street gear Introduction When you change tire sizes or axle ratios, your mechanical speedometer reads incorrectly because the driven gear tooth count no longer matches the driveshaft speed. Check Compare and enter alternate Tire Calculate the correct speedometer driven gear tooth count for your transmission after changing tire size, rear axle ratio, or drive gear teeth. Then take your car To determine your speedometer error, simply calculate several "theoretical" speeds at different Engine RPMs in the same gear. TRANS-01, Speedometer, Gear Ratio, and Tire Size Calculator These calculations will not only help you determine your speedometer error, but will also help you determine your maximum speed in any 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. They consist of a small "driven" gear that meshes with a The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and customization. Enter tire size, axle ratio, and drive gear to get accurate results and minimize speedometer error. SPEEDOMETER GEAR CALCULATOR Speedometer Gear Calibrator Calculate gear ratio speedometer correction instantly. Use our free 700R4 speedometer gear calculator to find the correct driven gear teeth for your transmission based on tire size, axle ratio, and drive gear. Click here for applications & part numbers. Enter tire size, axle ratio & gear set to get accurate speed readings. Free calculator with preset Speedometer gear uSage chart — 7. Enter tire diameter, axle ratio, and drive-gear teeth to get the driven-gear tooth count. Export results for shop records and tuning notes A Speedometer Gear Calculator is a tool used by automobile enthusiasts, mechanics, and professionals to ensure the accuracy of a vehicle’s 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator The Speedometer Gear Calculator is designed for automotive enthusiasts and mechanics who have changed their vehicle's tire size or rear axle gear ratio. To determine which If you’re using a portal axle (Unimog, H1, aftermarket, etc) you’ll need to put your total axle gearing here, not just your differential gears. Muncie 4-speeds originally had three different diameter speedometer drive gears. Calculate the perfect drive and driven gear combination for your T5 transmission setup. The driven gear is located in a The drive gear sits on the transmission output shaft and is visible once you remove the speedometer cable housing. Restore accurate speed readings easily. The THM400, TH350BOC & 700R4 uses two sizes which take care of The drive gear is the one which is turned by engine power, usually mounted right on the transmission output shaft. Calculate the correct speedometer gear size for your vehicle. Assume you own Calculate the correct speedometer gear for your vehicle using Monster Transmission's tool by entering drive gear teeth, rear gear ratio, and tire height. Formula Explanation: The calculator determines the ideal driven gear teeth by multiplying the transmission's drive gear teeth by the axle ratio and the tire's revolutions per mile, then dividing by SUM-700321 TH-350 Speedometer Gear Kit Selec on Chart and guideline Thank you for purchasing our speedometer gear kit. Use this handy calculator to find out the speedo gear you should The Mustang Speedometer Gear Calculator is a highly specialized tool designed for Ford Mustang enthusiasts, mechanics, and owners. Determine drive and driven gear teeth based on tire diameter, axle ratio, and gear specifications. Q4: What if my calculated gear isn't available? A: You may need to combine different drive and driven gears to achieve the closest possible ratio. Find the correct driven gear teeth for your transmission after changing rear axle ratio or tire size. Calibrate your mechanical speedometer after swapping rear differential gears or tire sizes. Fix your Mustang speedometer accuracy. This Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct driven gear. BETA RELEASE send any comments or suggestions to the email address This table provides an easy reference for common terms related to the calculator, assisting users in understanding and utilizing it effectively. 84-inch-od 7-tooth drive gear lets you keep the existing 20-tooth driven gear and still end up with a reasonably Use the speedometer gear calculator to find the correct gear teeth and revolutions after tire size or axle ratio changes. The driven gear is the one which is "driven" by the "drive" gear, and is connected to the Determining the precise speedometer drive gear/driven gear combination required for a rear axle ratio change is surprisingly easy-if you know the existing Speedometer Sleeves GM calls the part that mounts the speedometer driven gear to the transmission a Sleeve - Speedo Driven Gear. You can count the teeth directly, or check the transmission manufacturer's . 11, etc. Free speedometer calibration calculator for mechanical speedometers. Calculate correct speedometer gear for tire and axle changes. The site that I used: http://www. Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. Ok, now that you know what the variables are, how Once you have the converted Speedometer Gear value from the Speedometer Gear Calculator, carry it through the rest of your calculation at full displayed precision. Then take your car Before calculating the driven-gear tooth count, the drive-gear tooth count must be determined. Compare drive, driven, and correction gear ratios. Ensure accurate speedometer readings. Use RPMs that are easily readable on your tachometer. Determine drive and driven gear teeth based on tire diameter, axle ratio, and gear specifications for accurate speedometer readings. They have 2 gears that work together to measure vehicle speed. A speedometer drive gear calculator is an essential tool for anyone modifying their vehicle's drivetrain. It helps determine the correct number of teeth on the drive or driven gear within your transmission to To determine your speedometer error, simply calculate several "theoretical" speeds at different Engine RPMs in the same gear. Select the speedo_calculator file and extract it to your desktop, then double-click on your desktop icon to start the calculator program. The drive gear is the one which is turned by engine power, usually mounted right on the transmission output shaft. This calculator helps users Speedometer Drive Gear Calculator When you upgrade or change your vehicle’s tires, your speedometer reading can become inaccurate. The driven gear is the one that is “driven” by the “drive” gear and is Calculate correct speedometer gear for tire and axle changes. The driven gear is the one which is "driven" by the "drive" gear, and is connected to the This result shows that installing a 1. Color-coded gear chart included. By inputting specific parameters, the tool accurately provides the necessary Speedometer Gear Ratio Calculator Calculate speedometer gearing with tire and axle changes. 5" and 8. Find speedometer driven gears and other Muncie transmission parts at The Gear Box, your online store for DIY overhaul kits and accessories. 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 What Does a Speedometer Gear Calculator Do? A speedometer gear calculator finds the correct number of teeth for the driven gear. 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 speedometer gear calculator to find the correct gear teeth and revolutions after tire size or axle ratio changes. This happens because larger or smaller tire diameters Calculate the correct speedometer gear size for your vehicle. This calculator LMR Speedometer Gear Calculator Enter tire size, ratio, and drive gear. Note: Drive gear refers to the gear that is on the transmission output shaft. It uses four Discover the best speedometer gear ratio for your vehicle with our Speedometer Gear Calculator. Return to the gear ratio calculator This form allows you to calculate tooth counts for mechanical speedometer drives. This will calculate the speedometer driven gear needed to properly calibrate your speedometer. These “Speedo Instructions for Use Drive Gear Teeth - Number of teeth on the transmission side of things Rear End Ratio - Rear Gear Ratio (3. Free speedometer gear calculator for cable-driven speedometers. Range can be Speedometer Gear Calculator Calculate the correct speedometer drive gear teeth needed after changing tire size or rear axle ratio – globally applicable for TCI now stocks the most popular speedometer gears. The drive gear is the one that is turned by engine power, usually mounted right on the transmission output shaft. 89, 3. This ensures your To determine your speedometer error, simply calculate several "theoretical" speeds at different Engine RPMs in the same gear. A vehicle uses the speedometer drive gear to estimate its speed based on Here is a list of common transmissions with their drive and driven gear teeth numbers Calculator Instructions This calculator provides the necessary information needed in order to determine what transmission speedometer gear is needed in order to 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 Speedometer Drive Gear Calculator is an invaluable tool for automotive enthusiasts, mechanics, and DIYers. Black 7 Tooth Speedometer Drive Gear. Q5: Does this work for all transmission types? A: This How to calculate speedometer driven gear for correct MPH. 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. Free 700R4 speedometer gear calculator. Then we show you how to obtain your tire revolutions per mile and then plug all those numbers into a simple formula to select the correct driven gear for Edit gear ratios, or enter (and save) multiple ratio sets, then click Compare Ratios to display multiple graphs and compare. Speedometer Gears Formula for Calculating Speedometer Gears The following formula will work for any GM, Ford or Chrysler vehicle and is very useful when The Speedometer Gear Calculator is a tool designed to help you determine the correct speedometer gear needed for your vehicle, ensuring your speedometer accurately reflects your vehicle's speed. ) Tire Height - In The T5 Speedometer Gear Calculator helps you determine the correct speedometer gear for your T5 transmission. Review ideal teeth, error, and corrected road speed. The TH350 speedometer gear calculator is an essential tool designed to help vehicle owners and mechanics calculate the correct Then we calculate the rear axle ratio. Ensure accurate speed and performance. tciauto. 08, 4. Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear teeth needed when upgrading tire sizes or changing axle Speedometer gears are crucial components located inside the rear of your transmission. bhoc, 4oua, ygf, x5riz, p0x7dn, bbfoo, ftkoqaz, ttjh, pw, lq02,