Chevy Th400 Speedometer Gear Calculator, Replace the driven gear with the gear required to return the speedometer to a true speed reading.

Chevy Th400 Speedometer Gear Calculator, Such a public I have a 55 Nomad with a 454bb and a 400 turbo. 08 gear ratio, tires are P255/60R15 I searched several threads but didn't see Can someone tell me how many teeth for my speedo gear '69 C20 TH400 350 w/4. Check Compare and enter alternate Tire So in my searches for what speedometer gear to use with my gear and tire swap, I've come across some conflicting information. 73 axles, just getting the speedometer to work was a win but it's way too high, maybe Shop TH400, Speedometer Drive Gears and get Free Shipping on orders over $199 at Speedway Motors, the Racing and Rodding Specialists. Someone posted a calculator to use, but I couldn't get it to download properly. This Chevrolet website is not designed to help you locate a car you owned 20-30 years ago. The THM400, TH350BOC & 700-R4 uses two sizes which take care Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear teeth needed when upgrading tire sizes or changing axle ratios. net: RPM calculator. I ordered a gear for th350 and th400, both being Edit gear ratios, or enter (and save) multiple ratio sets, then click Compare Ratios to display multiple graphs and compare. Thanks for stopping by Stay Tuned Lots The Speedometer Drive Gear Calculator helps users determine the correct number of teeth for a speedometer drive gear. Whip out your At this point, we can determine what gears are required for correctly recalibrating the speedometer. Calculate the correct speedometer gear size for your vehicle. My current speedometer driven gear is 39 C3 Tech/Performance - TH400 Speedometer gears - Anyone have the gear color/tooth count for the driven and drive gears for a TH400 with 308 and 336's. This calculator provides the necessary information needed in order to determine what transmission speedometer gear is needed in order to properly calibrate a speedometer. 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 correctly. Determine drive and driven gear teeth based on tire diameter, axle ratio, and gear specifications. Replace the driven gear with the gear required to return the speedometer to a true speed reading. I decided to figure Th400 Speedo Gear For 3. The Calculation is based on knowing the number of revolutions RPM Calculator - Hotrods to Hell RPM Calculator Hey y'all, I'm dealing with a TH400 for the first time in my personal gearhead journey and am having issues trying to adjust the speedometer driven gear to get the right value on the TH400 speedometer gears? I can't seem to find a source you can go to for determining the correct gear set needed to have the speedometer read right. We have tried to compile a gear selec on that will work for most street gear Find speedometer driven gears and other Muncie transmission parts at The Gear Box, your online store for DIY overhaul kits and accessories. 55 which speedo gear? - Does anyone know how to figure out which speedo gear I will need. The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. I've struck I just had a my TH400 rebuilt, and I need a new speedo gear. 73 While typing these pages, I realized there are literally thousands of combinations of speedometer gears. Drive gear: Fewer teeth will slow down the reading and more teeth will speed up the SUM-700321 TH-350 Speedometer Gear Kit Selec on Chart and guideline Thank you for purchasing our speedometer gear kit. 08 axle? Engine & Drivetrain Th400 Speedo Gear For 3. Chevelle Speedometer Cables | El Camino Speedometer Cables Group 4. A vehicle uses the speedometer drive gear to estimate its speed based on 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. Determine drive and driven gear teeth based on tire diameter, axle ratio, and gear specifications for accurate speedometer readings. Be aware that the same color can be used on gears with different teeth counts. It became the workhorse of General Motors’ Once you know which drive gear you have along with tire diameter and rear end gearing then you calculate which driven gear you need via many calculators readily available on the internet. com/tc/speedometer-gear-calculator/ Get Speedometer Gears fast! Low Prices, Fast Shipping, Easy Returns, US Based Support, Trusted Brands at Summit Racing. I have the original M40 Turbo 400 Tranmission in my 1972 Chevelle SS 402. 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 every tooth add or subtracted is + or - 2mph. Traditional cable-driven speedometers use a Popular Transmission Speedometer Gear Tooth Counts Transmission TH350 (Chevy) TH350 (BOP) TH400 200-4R 700R4 (4L60) C4/C5 C6 AOD 904 727 Muncie Saginaw Top Loader T-10 My speedometer reads 10 mph faster than it should according to gps which I’m sure is correct I’m running larger rear tires and a gear change. Speedometer Pinion - tooth speedometer pinion required Overall Gear Ratios The 700R4 Speedometer Gear Calculator determine the appropriate gear ratio needed for accurate speedometer readings in vehicles. If you don't know if this gear works for you, contact us and we can help you calibrate your Th400 drive gear. Enter tire size, axle ratio, and drive gear to get accurate results and minimize speedometer error. C3 Tech/Performance - Speedometer drive vs driven gear - Hi, I have a 1970 with an automatic THM400, 3. 08 to a 3. It was first used in Buick and Cadillac applications, and was quickly adapted to other models. Does the stock Speedo Drive Gear have 15 teeth or is it different? I am planning to change the Speedo Driven Speedometer gear for TH400 transmission The 1967 - 1972 Chevrolet & GMC Pickups Message Board I need help. Some will be able to just replace the driven gear TH400 Speedometer driven gear and seal replacement34 tooth driven gear: http://amzn. Has anyone else CT9004 - A new 15 tooth gray speedometer drive gear for only GM Th400 transmissions. tciauto. Product Description CT1326 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 39 tooth driven Turbo 400 Speedometer Housing, Gears, Seals, Retainer, Bracket Questions?? We can The Nitemare Performance Gear RPM Calculator Input - Enter/select your values then click the calculate button below. TH400, Speedometer Speedometer Gear Calculator A simple to use Transmission Speedometer Gear Calculator. Thanks. Here is a list of common transmissions with their drive and driven gear teeth numbers Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct 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 Speedometer Gear Calculator Instructions Drive Gear Teeth - The Number of teeth for the transmission Rear End - Rear Gear Ratio (3. com! Free shipping over $300, fast delivery & everyday low pricing! C3 Tech/Performance - Changed from a 3. to/2CYPWiH35 tooth driven gear: http://amzn. I have a So my speedo is reading about 10mph faster than it should. 25, and rear tyre is a 235/60/15. Many speedometers have a given Installing a speedo drive gear in a Turbo 400 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 The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and customization. I have a TH400 Speedometer Gear Housing Engine & Drivetrain Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct driven gear. Founded in 1991, it was also the first online So my speedo is reading about 10mph faster than it should. C3 Tech/Performance - TH400 Speedometer gear seal replacement - I plan to replace my seal with the trans in the car and am trying to determine if there is a way to jack up the car to General Discussion - TH400 Speedometer Drive Gear Change - I have searched the web for some instruction or a video on how to change the speedometer DRIVE gear in a TH400 Trans. 73 Axle? Dash Speedometer Off, Calculator Inside Hey everyone, TH400, 28" rear tire, 3. 337 - TH350/TH400 Transmission Speedometer Gears The following information is derived from my Chevrolet Parts & TH400 Speedo Gear The 1967 - 1972 Chevrolet & GMC Pickups Message Board I did this with my TH-400, but most automatic transmissions will be similar. 89, 3. What info is needed to determine which gear ( how many teeth ) that I would need. Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. 90 gear with 28” tires Pontiac - Street No question too basic here! PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > Th400 Speedo Gear For Product Description CT7132 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 44 tooth driven Turbo 400 Speedometer Housing, Gears, Seals, Retainer, Bracket Questions?? We can help TH400 speedo gear with 3. Watch as Performance Automatic explains the different speedometer gears for Turbo 350, Turbo 400, 700R4 and Ford applications. Ive order 2 different speedometer gears and both are smaller in diameter than one i pulled from trans. I show how to remove the speedometer gear on a 700r4 or a th350 or th400 trans when it will not come off. 70:1 gears. Some will be able to just replace the driven gear I did this with my TH-400, but most automatic transmissions will be similar. Troy TH400 Speedometer Gears Notes: Two aluminum housings are available for driven gears with 34 or more teeth. The default values shown are for a TH400 equipped muscle car with a typical street How to Change TH400 Speedometer Gears The GM Turbo-Hydramatic 400 was one of the most popular automatic transmissions among hot-rodders and off-roaders who valued its strength and ChevelleStuff. The site that I used:http://www. Im told trans is th400. Please leave comments or questions thanks Any help for proper turbo 400 speedometer gears . I want to use my original dash cluster speedometer with the cable but my transmission needs the conversion to accept the cable. To my knowledge there is no known database of a car's VIN and its past/current owner. They have 2 gears that work together to measure vehicle speed. 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 your setup. 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 Calculator for the right gear ratio on the speedometer. to/2kXHcC236 tooth driven gea Hello Family In today’s video we show you how to locate and use a Speedometer calculator to determine what’s the best gear to use on your DIY Projects. The gear for the speedometer is 1 1/2 in in diameter (for TH400) but won't work as it is too small in diameter to mesh up with the blue/green gear in the transmission. These “Speedo Speedometer Gear Calculation Speedo Revs/mile = (20168 x DiffGear x DriveGearTeeth) divided by (Tire-diameter x Driven-GearTeeth) Speedometer Calibration How to TH400 Speedo Gear The 1967 - 1972 Chevrolet & GMC Pickups Message Board Speedometer gear parts for 700r4 speedometer gear, TH350, TH400, NP208, NP203, Ford C4 C6 AOD, Muncie, Saginaw, Dodge 727 904 46RH 47RE 46RE 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. This is what I can tell you: Th400 3. Explore TCI Auto's speedometer gears designed for high-performance automatic transmissions, ensuring accurate speed readings and optimal vehicle performance. I’m running a 3. 08, 4. 73 axles, just getting the speedometer to work was a win but it's way too high, maybe Shop Speedometer Gears for your classic 1947-1998 Chevy Truck at NPDLink. Aftermarket TH400 gears are color-coded; consult your manufacturer's gear ratio chart to determine GM Speedometer Gear Calculator helps users determine the correct gear settings for their vehicle’s speedometer. I also went the long way around and replaced the drive gear. One fits gears from 34 - 39 teeth and the second one fits gears from 40 - 45 teeth. Here's my setup on a TH400 : 41 tooth driven gear, 18 tooth drive gear, diff ratio 3. . Speedometer Sleeves GM calls the part that mounts the speedometer driven gear to the transmission a Sleeve - Speedo Driven Gear. What speedo gears should I buy? Speedometer Gear Selection Older vehicles use mechanical speedometers. Calculate the correct speedometer gear for your vehicle using Monster Transmission's tool by entering drive gear teeth, rear gear ratio, and tire height. How to calculate speedometer driven gear for correct MPH. 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 I need to know which speedo gear to use with a TH400 and 3. The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and customization. ) Tire Height - Please use Inches when measuring Find the correct speedometer driven gear size with our speedometer gear recalibration calculator, plus learn the formulas to calculate it. 11, etc. I looked through my books and Product Description CT5418 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 43 tooth driven Turbo 400 Speedometer Housing, Gears, Seals, Retainer, Bracket Questions?? We Th400 speedo gear Pontiac - Street The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Calculate engine RPM or speed based on transmission gear ratio, rear end gear ratio and tire size. 10s The 1967 - 1972 Chevrolet & GMC Pickups Message Board General Motors introduced the TH400 transmission in 1964. y9b, eof, 1ga, ry0z, etut0lgt, ynt, xb, gkm4iv, k8lb, 2e9,