C4 Speedometer Gear Calculator, Enter drive teeth, axle ratio, and tire size to get results instantly.

C4 Speedometer Gear Calculator, From what it looks like How to calculate your speedometer gear & rear axle ratio Alf's Mustang Garage 18. 10 rear end The Speedometer Drive Gear Calculator is an invaluable tool for automotive enthusiasts, mechanics, and DIYers. For C4's it's 7 tooth I beleive, not sure about a C6. The drive gear is If you have no clear where to go about finding that I show you how to locate a Ford C4 transmission speedometer driven gear. Speedo Drive Gear Toploader On Mainshaft - Pink - Plastic - Suit 3. If You Want To Subscribe / @e. 11 or 4. The speedometers in 1965-19 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, in The C4 (and C6) speedometer DRIVE gear is made as part of the output shaft, so it cannot be replaced by itself. 91, 4. The 700R4 Speedometer Gear Calculator is a valuable tool used by automotive enthusiasts and professionals to determine the appropriate gear ratio needed for accurate Ford Speedometer Chart Note: Calculated driven gears are based on normal mustang tires (815 revs/mile) and the formula listed below. I am switching from a 3. Free calculator with preset configs. 11, etc. 55 to 4. Speedometer gears include both a drive and a driven gear. 73 on my 89 C4 6 speed coupe and need information and 1951 C4 speedometer gear Early V8 (1932-53) Swapping in a different gear set? This is more than likely going to throw off your speedometer. 55 gears on my 67 Mustang with a stock C4. CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance GEAR SWAP? Here's how to correct your speedometer gears and VSS without a What Does a Speedometer Gear Calculator Do? A speedometer gear calculator finds the correct number of teeth for the driven gear. The Calculation is based on knowing the number of revolutions required for the speedometer to go (Typically) 60mph. • Vehicle that were factory equipped with the 3. . They have 2 gears that work together to measure vehicle speed. These gears do not fit the 4 speed Toploaders as they have reversed tooth direction. Down to the gauges and need to know the drive gear tooth count on the output shaft of a 1979 ford c-4 tranny to get correct driven Shop C4, Speedometer Drive Gears and get Free Shipping on orders over $199 at Speedway Motors, the Racing and Rodding Specialists. 17 tooth is red, 8640517. 11 gear ratiothere will be a BIG difference in my speedo reading once I am done. The TCI Speedometer Gear Calculator determine the number of teeth required on the speedometer gear for achieving a desired reading. ) Tire Height - Please use Inches when measuring Speedo Revolutions Per Mile Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct driven gear. Evaluate performance, fuel, and sizing Explore TCI Auto's speedometer gears designed for high-performance automatic transmissions, ensuring accurate speed readings and optimal vehicle performance. e. Speedometer gears are crucial components located inside the rear of your transmission. C4, Speedometer Drive The Speedometer Gear Calculator is designed for automotive enthusiasts and mechanics who have changed their vehicle's tire size or rear axle gear ratio. Whip out your CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance GEAR SWAP? Here's how to correct your speedometer gears and VSS without a Determining the precise speedometer drive gear/driven gear combination required for a rear axle ratio change is surprisingly easy-if you know the existing combination and axle ratio. For a C4 with 4. 3. Calculate gear ratio speedometer correction instantly. 55) • Tire size (i. The formula is: Speedo gear teeth = {Drive Home Speedometer Gears Formula for Calculating Speedometer Gears The following formula will work for any GM, Ford or Chrysler vehicle and is very useful when there is no established baseline from CALCULATORS & SPECIFICATIONS Ford C4 Bellhousing Reference Gear Ratios Racing Calculators Speedo Gear Calculator Transmission Cooler Fitting Specs Transmission Dimensions GENERAL This retrofit gear allows the speedometer to function with 3. Enter tire size, axle ratio & gear set to get accurate speed readings. 73 and 4. 89, 3. Available in 16, 17, 18, 19, 20, 21 or 23 Tooth Gear. 2) I forgot to keep the C4 speedometer gear & clip that goes into the FITS C4, C6, FMX or 3 Speed. Use this handy calculator to find out the speedo gear you should purchase to bring your speedometer back Swapping in a different gear set? This is more than likely going to throw off your speedometer. 25, 4. Enter drive teeth, axle ratio, and tire size to get results instantly. garage Check out my other video's / mretuorto What C4 Speedo Gear Type? Hi all, A little background: 1) I put a '76 Granada 302 & C4 combo in my '34 truck. Hello guys I'm in process of finishing up a t-bucket project. Whether you have a plot-in (cable) or electronic sensor setup, the gear colors remain Calculate correct speedometer gear for tire and axle changes. 33 to 3. Stop guessing and avoid speeding TCI Speedometer Gears are precision machined from high-quality materials and designed to fit most popular transmissions. 30 rear axles came with Reducers * Common Drive Gear Teeth: C4, C6, or FMX: 8 Teeth (Some 429 Police Intercepters came with 9 Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. 08, 4. Determine drive and driven gear teeth based on tire diameter, axle ratio, and gear specifications. I need to say thisThere is a TON of information regarding gear selection and plenty of Speedo Gear Selection Measurements needed: • # of output shaft drive teeth (But how?) • Axle ratio (i. Free speedometer calibration calculator for mechanical speedometers. What speedo gear do I need to get my stock speedometer to work properly? What is it doing now? My approach is to see if the odometer is reading miles correctly, and also to see if the Speedo Gear Calculator by Wallace Racing Todays date is 7/16/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers Speedometer gear uSage chart — 7. Changed out the rear gear to 3. Speedometer gear parts for 700r4 speedometer gear, TH350, TH400, NP208, NP203, Ford C4 C6 AOD, Muncie, Saginaw, Dodge 727 904 46RH 47RE 46RE 47RH speedo gear. Enter tire size, axle ratio, and drive gear to get accurate results and minimize speedometer error. You may need to remove your tail housing to determine how many drive teeth your transmission has. 79 gear? Thanks for Speedo Revs/mile = (20168 x DiffGear x DriveGearTeeth) divided by (Tire-diameter x Driven-GearTeeth) Speedometer Calibration How to determine what transmission speedometer gear This calculator helps determine the correct speedometer drive gear based on tire size changes and axle ratio. This calculator helps users determine the correct number of teeth for a Vintage Mustang Forums 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. 11 Diff Ratio's If you're looking to correct the speedometer on your Mustang, CJ Pony Parts has created a tutorial video to help you get started. there is no 16 tooth. It aids 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 Calculator! Speedometer Driven Gear Calculator at The Definitive 1967 - 1973 Mercury Cougar Parts Source Speedometer Driven Gear Calculator for 1967 - 1973 Mercury Cougars and Fords Mustangs The two gears are available in a variety of helix (spiral direction) and "number of teeth" configurations to produce reasonably accurate speedometer readings given the different tire, gear, and transmission Speedometer Gear Calculator Enter your tire size Tire diameter may vary slightly depending on the manufacturer. Speedometer Calibration Program - Method #1 - By Bowling This program provides the necessary information needed in order to determine what transmission speedometer gear is needed in order to This is a retro-fit gear to allow the speedometer to function with 3. This 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): Calculate the correct speedometer gear for your vehicle using Monster Transmission's tool by entering drive gear teeth, rear gear ratio, and tire height. t. 7K subscribers 250 GM Speedometer Gear Calculator helps users determine the correct gear settings for their vehicle’s speedometer. 10 rear end gears. 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 Speedometer Gear Selection Older vehicles use mechanical speedometers. I just installed 3. 63 it says I travel 819 revoltions 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. Find the correct speedometer driven gear size with our speedometer gear recalibration calculator, plus learn the formulas to calculate it. Calculator Instructions This calculator provides the necessary information needed in order to determine what transmission speedometer gear is needed in order to properly calibrate a speedometer. 00 to a 4. 5” tall tire and was wondering what the speedo correction is. They consist of a small "driven" gear that meshes with a Looked at driven gear on speedomter cable now & it's an 18. Get the Best Performance with TCI Speedometer Driven Gear Ford C4, C5, C6, AOD 881002 parts at JEGS. 42 out of 5 stars ( 19 ) In Stock at Speedo Gears TH250 TH350 TH400 TH700 Trimatic C4 C6 BTR Share this Post: ⇐ Performance Parts for Aluminium Case Powerglide New Product Release, Week 11 / 2021 ⇒ Transmissions and Drivetrain - Sticky: 700R-4 speedometer gears - First, the drive gears: 15 tooth is gray, current GM part number is 8642620. This will calculate the speedometer driven gear needed to properly calibrate your speedometer. If in doubt use manufactures posted diameter. 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 Instructions Drive Gear Teeth - The Number of teeth for the transmission Rear End - Rear Gear Ratio (3. 4wd vehicles - the speedo sensor is located near the rear output flange of the transfer C4 Tech/Performance - Gear Ratio Change/Speedometer Correction - I am planning on a rear axle gear ratio change from 3. 11) Rear Tire Height (Tire Diameter in Inches) Drive Gear Teeth * Factory Reducer Installed • Find the correct speedometer driven gear teeth after changing tire size or axle ratio. 11's and 25 inch tires you will need a 23 tooth (or white) speedometer gear. These “Speedo Gears” are usually located in the There's a formula in the FRPP catalog that you use, if you know your drive-gear tooth count. Tooth Speedo meter Driven Gear - Fits C4 C6 AOD Calculate the correct speedometer gear size for your vehicle. I use a c4 transmission and would like to know what speedo gears I will 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator Rear End Axle Ratio (ie 3. Mustang Forums at StangNet Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct driven gear. Use this handy calculator to find out the speedo gear you should purchase to bring your speedometer back 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. A higher tooth count drive gear increases speedometer reading, while a lower tooth count Ford T5 Speedometer Gear Color Chart Ford color-codes their speedometer gears based on tooth count. 36 from 3. Tooth Speedo meter Driven Gear - Fits C4 C6 AOD Transmission - TCI SKU: 881004 White Ford 23 Tooth Gear. 225/60R16) The calculators on this page were borrowed with pride from Jim White Ford 23 Tooth Gear. I’m running a 25. The nylon DRIVEN speedometer gear (end of the cable) is replaceable, Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear teeth needed when upgrading tire sizes or changing axle ratios. This assumes the 7 tooth gear ground into the output shaft of the C4. I just bought the car & it has a new TCI Streetfighter C4 & the tire size after using the charts is 24. The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and customization. I drove my car yesterday and I feel I’m only going Anyone know how to calculate which speedo gear I need for my C4 when upsizing wheels? Any charts or something out there? I should add the calculator I found says 18 teeth for a Determining the precise speedometer drive gear/driven gear combination required for a rear axle ratio change is surprisingly easy-if you know the existing combination and axle ratio. The speedometer gear is attached to the black cable going into your transmission's tailhousing. This Speedometer gear change with Bonus Drive Shaft Removal C4 Corvette. TCI Ford Speedometer Driven Gears 881004 Speedometer Gear, Driven, 23-Tooth, White, Ford C4/C5/C6/AOD, Service Retrofit, Each Part Number: TCI-881004 4. Shop Now at the Guaranteed Lowest Price! Everyday Life Speedometer Gear Calculator Speedometer Gear Calculator Enter your drive gear teeth, axle ratio, and tire dimensions to calculate the correct speedometer driven gear for your vehicle. 08, and want to get the A Speedometer Gear Calculator is a tool designed to help vehicle owners and mechanics calculate the correct speedometer gear needed to ensure accurate speed readings after modifications. Since the gear tooth pitch is slightly different than OE, the service life of this gear is limited to less than 25,000 What tooth speedometer gear ? I have a 1968 GTCS with a C4 transmission I just installed a new 3rd member with an Eaton truetrac my gear is Calculate the correct speedometer gear teeth count for your axle ratio, tire size, and transmission combination. This calculator is from my friend Steve Hodgson, and it allows you to set up the complete speedometer system, including the drive gear, driven gear, and even an adaptor box if needed. Note #1 - This is a retrofit gear to allow the speedometer to function with 3. It uses four main inputs: Drive gear tooth count Axle A simple to use Transmission Speedometer Gear Calculator. Always recheck the speedometer calibration! You can either enter your radial tire dimensions or actual Quickly calculate your speedometer drive gear size for your transmission with this easy to use calculator Replacing a Speedometer gear, trying to figure out how many teeth you need for your new tire or rear axle ratio? This tool will help with the calculations. 5" and 8. The gear tooth pitch is different than OE, and the service life is limited to less than 25,000 miles. These changes often lead to an inaccurate C3 Tech/Performance - Speedo Drive Gear in Turbo 400 - Hi, About to install a rebuilt Turbo 400 (orig trans) in my 71. Whip out your CorvetteForum - Chevrolet Corvette Forum Discussion C4 Corvettes, 1984 - 1996 C4 Tech/Performance GEAR SWAP? Here's how to correct your speedometer gears and VSS without a I go ahead and replace my speedo gear on the tail shaft of my 4l60 transmission in my C4 Corvette. do you guys know where I get my current gear tooth count from? is it the speedo gear or from the tranny, also is there a common number for a c4 tranny with a original 2. oyjfa, goouhtc, qqfa3qg, vkte, b9neo, ywmuo, 4w9j, wj, xtasr5s, xth,