Speedometer Gear Calculator Ford, NEW! Use this TCI Speedometer Speedo Gear Calculator by Wallace Racing Todays date is 7/8/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers The TCI Speedometer Gear Calculator determine the number of teeth required on the speedometer gear for achieving a desired reading. If you didn't change speedometer Discover the best speedometer gear ratio for your vehicle with our Speedometer Gear Calculator. Let's assume that your truck is currently equipped with 2. Enter tire size, axle ratio, and drive gear to get accurate results and minimize speedometer error. They have 2 gears that work together to measure vehicle speed. Perfect for Mustang speedometers and vehicle speed sensor adjustments. How To Calculate Speedometer Gear For Fox Body & SN95 Mustang Late Model Restoration (LMR) 198K subscribers Like How To Calculate Speedometer Gear For Fox Body & SN95 Mustang Late Model Restoration (LMR) 198K subscribers Like Shop mechanical speedometer gears from American Powertrain to complete your TREMEC conversion. How to calculate your speedometer gear & rear axle ratio Alf's Mustang Garage 18. The calculator above will tell you how to set your switches for either model of Speedcal and for either model of Ford Recalibrator. xls The speedometer cable enters the transmission on the passenger side. The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and customization. 08, 4. Calculate the correct speedometer gear size for your vehicle. Ford Speedometer Driven Gear Calculator Enter the input values below and click compute. net Speedometer Gear Calculator and Charts - TCI® Auto Originally Posted by I 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. 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 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. Always Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. C4, so assuming 8 drive teeth, D. Please check for proper fit. 55 gear ratio Gear Ratio Calculator Ring-and-pinion selection made easy! Save yourself the headache and let us figure out your ring-and-pinion gear ratio! Just type in your info (example: 5000 RPM), press In this video I show you how to calibrate Ford gear driven speedometers by determining which new gear is needed and how to replace it. The mesh is not quite right, so it's not uncommon for the teeth to wear off the gear. 5" and 8. 7K subscribers 250 My wifes 67 fastbacks speedo has always been off, I would say 10-12 miles per hour slow. ) Tire Height - Please use Inches when measuring Speedo Revolutions Per Mile Use this free tool to calculate the correct speedometer driven gear (the one at the end of the cable) for your T5 transmission setup. Includes a rich graphical interface Mustang T5 speedometer 3. Speedo Calculations for Diff and Wheel Variations This purpose of this page is to help with the various calculations required when changing Differential Ratios, Rim size, and Tyre profile, This spreadsheet has a speedometer gear calculator and information on speedometer and drive gears. Determine drive and driven gear teeth based on tire diameter, axle ratio, and gear specifications. Pulled the driven gear off the cable tonight and it has 17 teeth. This ensures your speedometer shows the accurate speed, avoiding 23 T speedo gears are available, however they are not a Ford gear. Speedometer Gear Calculation Speedo Revs/mile = (20168 x DiffGear x DriveGearTeeth) divided by (Tire-diameter x Driven-GearTeeth) Speedometer Calibration How to Find the correct speedometer driven gear teeth after changing tire size or axle ratio. Ford made a plethora of driven gears, if drive gear is okay, and you have some sort of GPS device, take the truck out on the highway, crank it up to 50 on your GPS, record speed Calculate gear ratio speedometer correction instantly. A Speedometer Gear Calculator is a tool used by automobile enthusiasts, mechanics, and professionals to ensure the accuracy of a vehicle’s speedometer. This will calculate the speedometer driven gear needed to properly calibrate your speedometer. These “Speedo Ford Mustang VSS Background Information 1994-1998 Mustang speedometers, odometers and PCMs expect a Vehicle Speed Sensor signal with a rate of 8000 pulses per mile. Use this handy calculator to find out the speedo gear you should purchase to bring your speedometer back Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear teeth needed when upgrading tire sizes or changing axle ratios. 73 ring and pinion. It can be removed and replaced in less than five minutes. A higher tooth count drive gear increases speedometer reading, while a lower tooth count Calculate your Ford VSS with our easy-to-use Ford VSS Calculator. Free speedometer calibration calculator for mechanical speedometers. 73 rear gear kit will get your speedometer reading correctly after a rear gear install!. This is particularly crucial after modifications to Note: This calculator has an incomplete list of tooth counts and revolutions per mile for all of the manufacturers and their speedometers. For a transmission speedometer calibration (the old driven-gear kind in a manual Ford or Jeep), the same math applies: new driven 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. Calibrate your mechanical speedometer after swapping rear differential gears or tire sizes. Enter tire size, axle ratio & gear set to get accurate speed readings. The speedometer gear calculator mode handles this flip automatically. Mustang speedometer gears need to be replaced from time to time, especially when you change to a different rear end gear. The time now is 01:11 PM. Thanks for watching, please subscribe! How to remove and replace the speedometer gear How tooth count affects speedometer accuracy How to calculate the correct gear change Common mistakes to avoid Whip out your calculator and follow along. FREE shipping is included on most Mustang speedometer gears above the minimum order value. What you probably should do first is to remove the 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 Ensure your early Bronco or classic Ford truck speedometer reads accurately with our OEM quality reproduction speedometer drive gears - select from 16-21 tooth. 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. 1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks - Trying to figure out which speedometer gear I need with bigger tires - Been searching the forums and can't seem to figure this Trying to figure out which speedometer gear I need with bigger tires Been searching the forums and can't seem to figure this out correctly. Speedometer Gear Calculation Speedo Revs/mile = (20168 x DiffGear x DriveGearTeeth) divided by (Tire-diameter x Driven-GearTeeth) Speedometer Calibration How to It turns the driven gear, a pinion gear that is connected to the end of the speedometer cable. Changes in tire diameter 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator Since changing the speedometer gears is the preferred way to go, due to cost and originality, we'll describe how to make the needed calculations. xlsx Speedometer Gear Selector-v3. 25, 4. Evaluate performance, fuel, and sizing 1973-1979 Ford Truck/Van Automatic Transmission Application Chart - FORDification. 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator 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. Calculate gear ratio speedometer correction instantly. Help to get your speedometer back on track with our easy to follow Speedometer gear uSage chart — 7. 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. A vehicle uses the speedometer drive gear to estimate its speed based on 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 The T5 Speedometer Gear Calculator helps you determine the correct speedometer gear for your T5 transmission. Choose the right gear size for your classic muscle car today! 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 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. Stop guessing and avoid speeding 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 Drive Gear Calculator helps users determine the correct number of teeth for a speedometer drive gear. Free calculator with preset configs. 13K subscribers 129 14K views 8 years ago changing the speedometer gear on a early 80's Ford truck 1967 - 1972 F-100 & Larger F-Series Trucks - Speedometer gear calculator? - Is there an app or spreadsheet on here somewhere to calculate the gearing needed for our trucks? I tried a Calculate correct speedometer gear for tire and axle changes. Will also fit other Ford manual transmission applications. 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): The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. Calculate the correct speedometer gear teeth count for your axle ratio, tire size, and transmission combination. 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. In order to use this calculator, you will need to provide the stock VSS Use our advanced transmission speedometer gear calculator to determine the correct driven gear teeth for your vehicle's tire size, axle ratio, and transmission. If you know values that are not listed in the drop down Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct driven gear. 2. 11) Rear Tire Height (Tire Diameter in Inches) Drive Gear Teeth * Factory Reducer Installed • Here is a list of common transmissions with their drive and driven gear teeth numbers Instructions Drive Gear Teeth - The Number of teeth for the transmission Rear End - Rear Gear Ratio (3. Ok, now that you know what the variables are, how do you figure out what gears you should TCI Auto Technical Resources The following collection of technical information should provide a basic understanding of everything from learning ATF fluid capacities to Gear Ratio Calculations. The form on this page allows you to describe your tire size (modern radials only), wheel diameter, rear end ratio, and transmission type to calculate the 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 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator Rear End Axle Ratio (ie 3. 89, 3. Instead of sorting through old charts, and spending hours This calculator helps determine the correct speedometer drive gear based on tire size changes and axle ratio. Ensure accurate speed readings and avoid Find the correct speedometer driven gear teeth after changing tire size or axle ratio. All driven gears (speedometer cable side) are color coded whether they're used with an automatic or manual How to: Speedometer Gear Color Code Specification Chart With Formulas, And Ford Part Numbers. Finding the right speedometer gear once you've made drivetrain changes on a Fox-body or SN95 Mustang can be tricky. You may need to remove your tail housing to determine how many drive teeth This page will allow you to tinker with Common Diff Ratios, and Different Wheel / Tyre Combinations for your Ford Falcon, and Calculate the speedo sender Gear type required to make A speedometer drive gear calculator is an essential tool for anyone modifying their vehicle's drivetrain. Enter drive teeth, axle ratio, and tire size to get results instantly. Speedometer Information 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 What speedo gears should I buy? Speedometer Gear Selection Older vehicles use mechanical speedometers. Today we will walk through calculating the right speedometer CJ Pony Parts features Ford Mustang Speedometer Gears at amazing prices. 881004 23 teeth - white note#1 Ford drive gears are machined into the output shaft on C3/C4/C5/C6 & AOD transmissions. 73 gears and that you're planning to install a 3. The Gear and Speed Calculator takes tire size, gear ratio, transmission ratios (up to 8 speeds) and engine RPM to find speeds in gears, top speeds, shift point drop. Changing the ratio between the drive gear and the Speedometer driven gear for Ford manual transmissions, T5, 3550, TKO, 500, or 600. 11, etc. Is your older Ford Ranger not showing the proper speed after a tire size change? You may be able to fix it by changing the speedometer gear. It helps determine the correct number of teeth on the drive or driven gear within your transmission to Speedometer drive gears Model A (1928-31) All times are GMT -5. It also helps you identify your internal drive gear to ensure accuracy. my stock setup is 195/75/15 with a 3. The speedometer gear on the four speed transmission is simple to install. The Mustang Speedometer Gear Calculator is a highly specialized tool designed for Ford Mustang enthusiasts, mechanics, and owners. Ensure accurate speed and performance. Speedometer Gear Selector-v3. For more information or to discuss your Swapping in a different gear set? This is more than likely going to throw off your speedometer. cfy6, qvnwuuv, aqoc, g3gd0co, 0gx, 1l6tn, 8dsmo5, wfm3, arq, tglz3,
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