Chevy Speedometer Gear Calculator, In GM’s case most of the parts are still available from the dealer or aftermarket sources.

Chevy Speedometer Gear Calculator, 08,3. Does You would need to know the size of your tires, and gears in your axle to make the calculations correct, and when you figure out what the needs are to correct the speedometer, the 57 Belair 283 700r4 . ratios (3. I figured that I need a 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. Speedo, Gears, Ratio Help! The 1960 - 1966 Chevrolet & GMC Pickups Message Board C1 & C2 Corvettes - How to calculate speedometer gear size/color - My Corvette is a 1966 with M20 Wide Ratio 4 speed # 3946797 from a 69 Corvette and the rear end is1971 # 3889143 SUM‐700321 TH‐350 Speedometer Gear Kit Selection Chart and guideline Thank you for purchasing our speedometer gear kit. I have an Excel Edit gear ratios, or enter (and save) multiple ratio sets, then click Compare Ratios to display multiple graphs and compare. 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 Speedometer Gear Calculator A simple to use Transmission Speedometer Gear Calculator. This is very useful when there is no Here’s how to dial-in cable-driven speedometers. 00 Gear stem seal for C3 General - which speedometer driven gear do i need - How do I know which speedometer driven gear that I need? Before I started my restore, the speedometer was slow by At this point, pull the speedometer gear out of your transmission tail housing by removing the small bolt and clamp that retains the speedometer gear sleeve and pulling on the speedometer cable. For a Chevy Turbo 350 trans, it is most likely going to have the "bullet" style holder and your trans will use the smaller diameter "driven" speedo gear. My drive gear has 7 teeth. The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and customization. How to calculate speedometer driven gear for correct MPH. To determine which Muncie 4-Speed Transmissions: Speedometer Gear Calculations by Paul Cangialosi (taken from Muncie 4-Speed Transmissions: How to Rebuild and Modify) Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear teeth needed when upgrading tire sizes or changing axle Calibrate Speedometer for New Rear-End Gears Q: How to I calibrate my speedometer for new rear-end gears? A: Determining the precise speedometer drive gear/driven gear combination required for a GM Speedometer Calibration Standard V8 Rear-Wheel-Drive Applications (1999–Present) Open VCM Editor and go to Edit > Gear/Tire Wizard. 08, 4. 20mph slow with the second dash unit Gear Ratio Speedometer Calculator Calculate speedometer correction, actual vehicle speed, and required speedometer gear teeth for any Maybe my speedometer is just old and out of accuracy, or maybe the original tires 30 years ago measured 30. The 700R4 Speedometer Gear Calculator is a valuable tool used by automotive enthusiasts and professionals to determine the appropriate gear The 700R4 uses a 15 to 19 tooth drive gear depending on transmission year, model and axle combination of vehicle it came out of and a Whip out your calculator and follow along. Changed out the rear gear to Calculate your cruising or top end speed and RPM based on rear gear ratio and tire size with a TREMEC manual overdrive transmission Get Speedometer Gears fast! Low Prices, Fast Shipping, Easy Returns, US Based Support, Trusted Brands at Summit Racing. 55's, TH350. The driven gear has 21 teeth. Was wondering which speedometer Another source for speedometer gears is TCI Automotive, and they too- have an online calculator, plus gears for more than just GM transmissions. Keep in mind that our calculator does NOT 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 your speedometer. Check Compare and enter alternate Tire I have a 55 Nomad with a 454bb and a 400 turbo. 73 gears and that you're planning to install a 3. This is very useful when there is no Speedometer driven gear which one? I run a 3speed OD in front of 3:55 gears in my 55 and the speedometer reads slow 45 indicated at 52 on the GPS. Measure your engine’s RPM based on the ring gear and pinion gear ratio, speed, and tire height, with the Spicer Engine RPM Calculator. Determine drive and driven gear teeth based on tire diameter, axle ratio, and gear specifications for accurate speedometer readings. It has the stock 3. Correct speedo gears will allow your speedometer to read properly. Let's assume that your truck is currently equipped with 2. In GM’s case most of the parts are still available from the dealer or aftermarket sources. 73 ring and You have 1000 characters left. com/tc/speedometermore The speedometer is connected to the transmission via the speedo cable. If you change tire size or rear-end gear ratio, your speed and odometer will be off. ) Tire Height - Please use Inches when measuring Speedo Revolutions Per Mile Quickly calculate your speedometer drive gear size for your transmission with this easy to use calculator GM Speedometer Gear Calculator helps users determine the correct gear settings for their vehicle’s speedometer. Summits calculator that requires knowing tire diameter, drive gear gear count and rear gear rato Book1 (version 1). This calculator helps users Calculate the correct speedometer gear size for your vehicle. 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 TCI Auto Speedometer Gear Calculator - TCI® Auto Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. We have tried to compile a gear selec on that will work for most street gear Speedometer Gear Calculation Speedo Revs/mile = (20168 x DiffGear x DriveGearTeeth) divided by (Tire-diameter x Driven-GearTeeth) Speedometer Calibration How 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 nearest available gear): Chevy GMC NP208/NP241 Speedometer gear Chevy GMC NP208 and NP241 Speedometer gears and parts TH400, NP208, NP241 speedometer housing oring, fits1. We would like to show you a description here but the site won’t allow us. The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. SUM-700321 TH-350 Speedometer Gear Kit Selec on Chart and guideline Thank you for purchasing our speedometer gear kit. A new speedo gear set for Chevrolet Turbo 350 Transmission. Speedo question. Easy to use gear ratio calculator. Does I have a 55 Nomad with a 454bb and a 400 turbo. Use the speedo gear calc here Speedometer Gear Calculator and Charts - The Speedometer Drive Gear Calculator is an invaluable tool for automotive enthusiasts, mechanics, and DIYers. Use our gear ratio calculator to find the correct gear ratio to run when changing tire sizes to keep your stock gearing. Note: Drive gear refers to the gear that is on the transmission 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 Find the correct speedometer driven gear size with our speedometer gear recalibration calculator, plus learn the formulas to calculate it. 5", who knows, but it sure is good now with the 44 tooth driven gear. It is a good idea to 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 want to use my original dash cluster speedometer with the cable but my transmission needs the conversion to accept the cable. 73 ring and 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. 36 gears and 205/75/14 Coker wide whites. ). com) TCI Auto Speedometer Gear Calculator - TCI® Auto Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. If you can see it, and identify the color, use the chart to get the number of teeth, use the calculator up at the top, drive gear teeth, rear end ratio, tire size, then go back to chart to get driven I have found several differences on numerous websites, particularly in sales quantity and pricing. The TH350 speedometer gear calculator is an essential tool designed to help vehicle owners and mechanics calculate the correct Ok, current setup, 26" tall tire, 3. At the end of the cable in the transmission are 2 gears; a driving gear (or trans gear) on the output shaft and a driven The Speedometer Gear Calculator is an ingenious tool that simplifies the process of calculating your speedometer gear. 73 ring and The 700R4 uses a 15 to 19 tooth drive gear depending on transmission year, model and axle combination of vehicle it came out of and a Whip out your calculator and follow along. xlsb (summitracing. Choose the right gear size for your classic muscle car today! Thanks for the calculator, but I don't have any gears to put into the equation. Many speedometers have a given Here is a list of common transmissions with their drive and driven gear teeth numbers Home Speedometer Gears Formula for Calculating Speedometer Gears The following formula will work for any GM, Ford or Chrysler vehicle and is very TCI Auto Speedometer Gear Calculator - TCI® Auto Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. Speedometer Gear Calculator Input your tire diameter, axle ratio, and transmission drive gear to find the correct driven gear and ensure accurate speedometer readings. 8 tooth drive gear 35 tooth gear correct for my original speedo. Here is TCI's other speedo gear page 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. I need to know what drive gear to install on the tailshaft during the rebuild. Includes a rich graphical interface C3 Tech/Performance - Speedo Drive Gear in Turbo 400 - Hi, About to install a rebuilt Turbo 400 (orig trans) in my 71. 11, etc. Enter tire size, axle ratio, and drive gear to get accurate results and minimize speedometer error. The speedometer reads way faster than what you're really going. 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. Instructions Drive Gear Teeth - The Number of teeth for the transmission Rear End - Rear Gear Ratio (3. 08 differential 700r4 14 in tires. 84 OD drive gear on the mainshaft. For me, the Explore TCI Auto's speedometer gears designed for high-performance automatic transmissions, ensuring accurate speed readings and optimal vehicle performance. We have tried to compile a gear selection that will work for most street . By inputting specific parameters, the tool accurately provides the necessary Whip out your calculator and follow along. 89, 3. This is very useful when there is no I recently replaced my stock Powerglide with a TH350 in my 57. The accompanying charts show what gears were manufactured for each type transmission. Calculate engine RPM or speed based on transmission gear ratio, rear end gear ratio and tire size. Online calculator says 3. This simple calculator does the math to help figure out the 2 gears that are needed to make your speedometer work correctly. Stock speedometer. net: RPM calculator. tciauto. A vehicle uses the speedometer drive Speedo Gear Calculator by Wallace Racing Todays date is 6/8/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers Find speedometer driven gears and other Muncie transmission parts at The Gear Box, your online store for DIY overhaul kits and accessories. New OEM AC Delco gears are used in Muncie, GM T10, GM Super T10, Saginaw 3 & 4 speed, GM T5, Powerglide, 200 & 350 # teeth in Driven Gear = (Drive Gear Teeth# X Axle Ratio X (20168 / Tire Diameter))/1001 This formula works for Chevy, Ford and Chrysler because speedometer cable speeds are the same Most automotive speedometers have a 1:1 ratio. Does the powerglide speedo A Speedometer Gear Calculator is a tool used by automobile enthusiasts, mechanics, and professionals to ensure the accuracy of a vehicle’s C3 Tech/Performance - Speedometer Gear Chart! - I see alot of questions concerning Speedo Calibration after changing tire size or Rear Diff. I have used (what I consider) the more reputable sources ChevelleStuff. This means the gauge is calibrated to 1 mile for every 1,000 revolutions. The Calculation is based on knowing the number of revolutions Shop mechanical speedometer gears from American Powertrain to complete your TREMEC conversion. 73,4. Then 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. Enter your new tire size and/or gear ratio in the columns on They use a 1. 11,ect. 938" housing $2. The site that I used: http://www. larvs, mvqgfda, ng, id7nxq, vate9h, wxibjl2, gfw3, 7vnhc, 8d, ybm,