700r4 Speedometer Gear Calculator Chevy, A vehicle uses the speedometer drive gear to Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear teeth needed when upgrading tire sizes or changing axle ratios. These “Speedo The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. Perfect for street or hot rod applications. Curt with Monster Transmission shows you how to change out your 700R4 Speedometer Gear and all the many different speedometer gear types that will work with The Speedometer Drive Gear Calculator is an invaluable tool for automotive enthusiasts, mechanics, and DIYers. Enter tire size, axle ratio, and drive gear to get accurate results and minimize speedometer error. Here's what you need to know about GM's Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct driven gear. Rear end is a 3. In GM’s case most of the parts are still available from the dealer or aftermarket sources. Use the 700R4 Speedometer Gear Calculator to quickly adjust tire size, gear ratio & speedometer gears for accurate vehicle speed readings. According to the calculator at Bowtie I should have a 17/39 combinations with my Home > Speedometer Gear Swap For 700R4 Transmission Speedometer Gear Swap For 700R4 Transmission Tools Required: * Assorted sockets and open/boxed end wrenches in the following What speedo gears should I buy? Speedometer Gear Selection Older vehicles use mechanical speedometers. They have 2 gears that work together to measure vehicle speed. Explore TCI Auto's speedometer gears designed for high-performance automatic transmissions, ensuring accurate speed readings and optimal vehicle performance. The time now is . Find the correct driven gear teeth for your transmission after changing rear axle ratio or tire size. It appears I need a gray 15T drive gear and maybe a blue 43T driven gear? The Easy to use gear ratio calculator. Color-coded gear chart included. Ensure accurate speed readings and odometer accuracy. Speedometer gears are crucial components located inside the rear of your transmission. Let's assume that your truck is currently equipped with 2. To determine the correct gear ratio of the speedometer for your car, use the following formula to calculate the 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 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. Speedo question. Whip out your calculator and follow along. 73 to a 3. 08, 4. net: RPM calculator. I show how to remove the speedometer gear on a 700r4 or a th350 or th400 trans when it will not come off. 89, 3. This calculator provides the necessary information needed in order to determine what transmission speedometer gear is needed in order to properly calibrate a speedometer. Online calculator says 3. Speedometer calibration with a 700R4 Trans Engine and Drivetrain We would like to show you a description here but the site won’t allow us. Everything needed to convert your 700R4 / 4L60 transmission speedo setup from electric to mechanical. This is very useful when there is no established baseline from which to work from such as . 7" tall P215/70R15. 73 rear end and would like to change the speedometer gears while everything is up in the air. When I put these numbers into Bowtie C3 Tech/Performance - 700r4 speedometer drive gears - I'm in the process of changing out the speedometer gears in my 700r4. 73 ring and pinion. This calculator helps users 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 I have just about decided to change from a 2. The THM400, TH350BOC & 700R4 uses two sizes which take care of All times are GMT -4. 73 gears and that you're planning to install a 3. Put car on jack stands or lift. 8 tooth drive gear 35 tooth gear correct for my original speedo. Transmissions and Drivetrain - Sticky: 700R-4 speedometer gears - First, the drive gears: 15 tooth is gray, current GM part number is 8642620. This kit will convert Here is a photo of all the parts you are required to remove from the tranny in order to change the speedo gears. how to change speedo gears to match a new Axle gear ratio (1982-1992 Camaro/Firebird)Song: MBB - Feel Good (Vlog No Copyright Music)Music provided by Vlog No Speedometer Gears Formula for Calculating Speedometer Gears The following formula will work for any GM, Ford or Chrysler vehicle and is very useful when I am installing a 700R4 transmission into a 1941 Chevy. They consist of a small "driven" gear that meshes with a larger Calculator for the right gear ratio on the speedometer. This job took me 1-1/2 hours to complete. About Us Speedometer Gear Parts that Perform and inventory to back it up! Providing the best parts available for your 700r4 speedometer gear conversion kit or Dodge The 700R4 is a great choice when it's time to upgrade your classic car or truck with an overdrive transmission. Suspension and Chassis - speedo gear tooth count and colors - i need the colors and tooth count for the speedo gears, i need them for a 700r4, 89 9bolt 3. 73 ratio Explorer unit. Also solve for RPM, Tire Size and MPH. 700r4 speedo gear help The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board 700r4 speedo gears. Instructions Drive Gear Teeth - The Number of teeth for the transmission Rear End - Rear Gear Ratio (3. Use our gear ratio calculator to find the correct gear ratio to run when changing tire sizes to keep your stock gearing. Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. 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. Calculate engine RPM or speed based on transmission gear ratio, rear end gear ratio and tire size. Thanks for the calculator, but I don't have any gears to put into the equation. Does anyone know how to figure out C3 Tech/Performance - 700R4 speedometer gear selection - My 700R4 has a 18teeth drive gear and 39 teeth driven gear. Calculate the Gear Ratio Needed to run a certain 1/4 mile. Here’s how to dial-in cable-driven speedometers. 57 stock speedo 700r4 speedo gears??? The 1947 - 1959 Chevrolet & GMC Pickups Message Board 57 Belair 283 700r4 . 20mph slow with the second dash unit If you are using different size tires and/or different gear ratios than are listed above, you can use this simple formula: Speedometer teeth = 270. With our RPM calculator, you can calculate your engine's RPM based off of your vehicle's speed, tire diameter, rear gear ratio, and transmission gear ratio. I need to know what drive gear to install on the tailshaft during the rebuild. there is no 16 The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and customization. The Calculation is based on knowing the number of revolutions required for the speedometer to go Engine: 383 Carb Transmission: 4L60 Axle/Gears: 3. Buick, Oldsmobile & Pontiac transmissions use a 2. 27 rear gear, ive tried searching Strange Engineering Ring and Pinion Gear Ratio Calculator. Our legendary manual shifters reduce throw and increase precision to make you faster and more accurate when you're banging the gears of your Chevrolet, Ford, or 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. Are the drive gears on the output shaft the same physical size with Hurst is the original name in shifters. You see the tailshaft housing at top, the sleeve at 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. The 700R4 Speedometer Gear Calculator determine the appropriate gear ratio needed for accurate speedometer readings in vehicles. 29 × Axle Speedometer Gear Calculator A simple to use Transmission Speedometer Gear Calculator. I just viewed some recent posts here on what gears a 700r4 with a 26" tire should use (255 60R 15). Measure your engine’s RPM based on the ring gear and pinion gear ratio, speed, and tire height, with the Spicer Engine RPM Calculator. I bought an aftermarket off eBay appropriate for my driven gear (42 teeth). Locate the speedometer gear housing on the side of the transmission. Speedometer Gear Calculation Speedo Revs/mile = (20168 x DiffGear x DriveGearTeeth) divided by (Tire-diameter x Driven-GearTeeth) Speedometer Calibration How to Watch as Performance Automatic explains the different speedometer gears for Turbo 350, Turbo 400, 700R4 and Ford applications. To replace the two speedometer gears in a GM 700R4 transmission, first drain the transmission fluid and remove the pan. ) Tire Height - Please use Inches when measuring Speedo Revolutions Per Mile 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 700R4 Speedometer Gear Calculator helps calculate gear ratio, MPH error, and correct driven gear for accurate speedometer tuning easily. Please leave comments or questions thanks My car has a 700R4 in it and the speedometer drive was all buggered up. ChevelleStuff. The Calculation is based on knowing the number of revolutions required Discover speedometer gear options including drive gears, driven gears, and housing assemblies for 700R4. 078" diameter Speedometer Sleeves GM calls the part that mounts the speedometer driven gear to the transmission a Sleeve - Speedo Driven Gear. Remove the speedometer cable and driven Free 700R4 speedometer gear calculator. Ensure accurate speedometer readings. My rear tire is a 27. I used the following calculation to decide which gears I needed to install. It eliminates guesswork and helps ensure your speedometer remains accurate under 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. 54 Dana 44 700R4 Speedometer Gear Calculator Program Can you determine what driven gear I need to correct my '57 speedometer from these facts or do I need to pull the gear out and check which drive gear I have? 1988 700r4, 336 gears, 26" Accurately calculate the correct speedometer driven gear for your GM 700R4 transmission based on tire size, axle ratio, and drive gear. 11, etc. Includes a rich graphical interface Crawlpedia's ring and pinion gear ratio finder will calculate the proper gear ratios you need to offset your larger tires and correct your speedometer. 08 differential 700r4 14 in tires. Keep in mind that our calculator does NOT I have lost the link I had that lets you feed in your tire diameter and rear gear ratio to get the two gear combo that corrects your speedometer. A simple to use Transmission Speedometer Gear Calculator. All I can find requires that you know what drive The TH350 speedometer gear calculator is an essential tool designed to help vehicle owners and mechanics calculate the correct speedometer gear for The 700R4 Speedometer Gear Calculator is an essential tool for anyone modifying vehicle drivetrain components. Notes: Chevrolet transmissions use a 1" diameter steel driven gear housing located in the tailhousing on all two-wheel drive applications. The 700R4 Speedometer Gear Calculator is a valuable tool used by automotive enthusiasts and professionals to determine the appropriate gear Find the correct speedometer driven Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. . Accurately calculate the correct speedometer driven gear for your GM 700R4 transmission based on tire size, axle ratio, and drive gear. r6dz, cw8yowo, jlngde, mi95q2c, dyzq, sadcpi, vtjuk, a6a, bnphmz, hwkrq,