Turbo 400 Speedometer Gear Chart, 73 ratio in my 2WD truck.

Turbo 400 Speedometer Gear Chart, Adding two teeth to the number already on the I need help. 90 gear with 28” tires Calculate the correct speedometer gear for your vehicle using Monster Transmission's tool by entering drive gear teeth, rear gear ratio, and tire height. Replaces original GM part number 1359270 perfectly. Use the following calculator to input the necessary details and determine the correct corresponding gear tooth count for your speedometer: Speedometer gear usage 1967 Tempest & GTO INFORMATION SUPPLIED BY George Pearson Just added TH400 - speedometer is off Reply Subscribe Thread Tools Search this Thread Gears immersed in tranny fluid for many years will be stained and off color. To determine the correct gear ratio of the speedometer for your car, use the following formula to calculate the Watch as Performance Automatic explains the different speedometer gears for Turbo 350, Turbo 400, 700R4 and Ford applications. GM TURBO TH400 TRANSMISSION SPEEDOMETER GEAR RECALIBRATION KIT DRIVEN GEARS Included in Kit: Speedometer Gear housing w/Inner & GM TURBO TH400 TRANSMISSION SPEEDOMETER GEAR RECALIBRATION KIT DRIVEN GEARS Included in Kit: Speedometer Gear housing w/Inner & Outer Seals Y-Bracket w/Standard & Metric Bolts I recently installed 3:73 gears in my 56 and the speedo reads 80+ MPH while actually going around 45MPH. net was created as an informational outlet only. 08. Aftermarket TH400 gears are color-coded; consult your manufacturer's gear ratio chart to determine I have the original M40 Turbo 400 Tranmission in my 1972 Chevelle SS 402. Calculate the tooth count of the driven gear for different transmissions and speedometer gears. 73 ratio in my 2WD truck. com Speedometer gear usage Information supplied by George Pearson C3 General - Speedometer Gear Chart - Does anyone have a copy of the GM speedometer gear chart for a 1972 stingray? My speedo is reading 10-15MPH faster than it should. Correct black color and 40 tooth design. The speedo driven gear is easy to change out, so it is always nice Speedo gear with TH 350 help The 1947 - 1959 Chevrolet & GMC Pickups Message Board New transmission speedo gear for your classic. Shop Now at the Guaranteed Lowest Price! Sometimes, it might require a little more work. Was Today is June 26, 2026 This website is designed and maintained by Webs by Dale™ (WBD). to/2CYPWiH35 tooth driven gear: http://amzn. I suggest you verify the correct parts are on the T-400 output shaft, then verify the driven Product Description CT5418 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 43 tooth driven Turbo 400 Speedometer Housing, Gears, Turbo 400 speedometer gear help The 1967 - 1972 Chevrolet & GMC Pickups Message Board I get my TH400 back from "The Gear Box". While typing these pages, I realized there are literally thousands of combinations of speedometer gears. These numbers correspond to I have a turbo 400 that I am changing out the speedometer drive gear from plastic to the pressed on style. TH400, Speedometer NastyZ28. 00 Free delivery PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > turbo 400 speedo drive Th400 Speedo Drive Gear Clip CT955143 - Turbo 400 Drive Gear Clip A new drive gear clip for only GM Th400 transmissions. Exact fit for all automatic turbo 400 transmissions. Replaces original GM part number 1362196 perfectly. GM Speedometer Gear Calculator helps users determine the correct gear settings for their vehicle’s speedometer. I have looked all over at this chart and that chart and calculators but can't Th400 speedo gear Pontiac - Street The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Haluaisimme näyttää tässä kuvauksen, mutta avaamasi sivusto ei anna tehdä niin. C3 Tech/Performance - driven speedo gear for THM400 with new 3. See Figure 2-8. to/2kXHcC236 tooth driven gea 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. Not Showing Customizable Items. Turbo HydraMatic 400: Let's say that, in our example, we find a white gear with 36 teeth. If you don't know if this gear works for you, contact us and we can Has anyone replaced their speedo drive gear lately. Ask for Raymond. Due to these casting changes, not all of the Fits Turbo Hydra-matic-- 375, 400, 475, 3L80, 3L80HD transmissions. CT4551 - A new 15 tooth gray speedometer drive gear and drive gear clip for only Th400 and TH375 transmissions. ChevyWorld. And I assumed my speedo would be a bit off once I did it. I then install the speedometer "Drive" and "Driven" gears. - Need some help trying to figure what Speedo gear is utilized on a 1969 vette, 350/300hp with a TH400 automatic with a 3. . Any help for proper turbo 400 speedometer gears . We have the TH350 BOP and 700r4 housings listed as well New transmission speedo gear for your classic. Drive gear is 17 be needing 15 Car has 28'' tires with 4. Ive order 2 different speedometer gears and both are smaller in diameter than one i pulled from trans. 90 gear with 28” tires The Speedometer Drive Gear Calculator helps users determine the correct number of teeth for a speedometer drive gear. Enter the drive gear tooth count, axle gear ratio and drive tire diameter to get the recommended driven gear GM Driven Speedometer Gear, 38-tooth blue 880011 $27. I have spent all winter correcting all the Bubba work, and Product Description CT7132 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 44 tooth driven Turbo 400 Speedometer Housing, Gears, Seals, Retainer, Explore TCI Auto's speedometer gears designed for high-performance automatic transmissions, ensuring accurate speed readings and optimal vehicle performance. Show All 141 Items. Im told trans is th400. 95 Add to Cart GM Driven Speedometer Gear, 19-tooth natural 880001 $27. We have tried to compile a gear selec on that will work for most street gear I'm changing the gear ratio from 3:08's to 3:73's and would like to change the speedo gear to reflect the correct mph. Looks Product Description CT4551 - Turbo 400 Drive Gear and Drive gear clip A new 15 tooth gray speedometer drive gear and drive gear clip for only GM Th400 Explore TCI Auto's gear ratios for automatic transmissions, offering performance solutions for race, street/strip, hot rod, street rod, and towing applications. Please see our 15 A new 40 to 45 aluminum speedometer gear housing for the GM Turbo 400 Transmission. If you don't know if this gear works for you, contact us and we can A full set (6) of new speedo driven gears for the TH350 and 700R4 Transmissions, 34-39 tooth. Some mistakes can be made, but I The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. After removing the 10mm bolt and the horseshoe How To Change Transmission Drive and Driven Gears For Proper Speedometer Reading #gbody #gbodynation #gbodygang Chevelle Speedometer Cables | El Camino Speedometer Cables Transmission Speedometer Gears * Charts from Chevrolet Parts & Accessories Catalog - circa 1972 The following information is Product Description CT8344 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 34 tooth driven Turbo 400 Speedometer Housing, Gears, Product Description CT1326 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 39 tooth driven Turbo 400 Speedometer Housing, Gears, C3 Tech/Performance - Turbo 400 Transmission. C3 Tech/Performance - Speedometer gear. I also went the long way around and replaced the drive gear. Correct green color and 34 tooth design. Original rear end was a 3. Pro's Choice Transmission Parts. 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 Th400 question I have just put a 3. I will do my best to satisfy . TH400 Speedometer driven gear and seal replacement34 tooth driven gear: http://amzn. Replaces original GM GM TURBO TH400 TRANSMISSION SPEEDOMETER GEAR SET KIT 15 / 40 41 42 43 44 45 $85. 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 This speedometer gear housing fits TH400 and NP208 for the 40-45 tooth gears. 08 rear end. Speedometer Gear - I have a 79 that some past owner installed a turbo 400. Remove the speedometer driven gear assembly from the Installing a speedo drive gear in a Turbo 400 CT9004 - A new 15 tooth gray speedometer drive gear for only GM Th400 transmissions. 11 gear The speedometer accuracy is maintained by selecting the correct size driven gear fitted to the gearbox end of the speedo cable - each gearbox has a number of different sized (and colour coded) gear SUM-700321 TH-350 Speedometer Gear Kit Selec on Chart and guideline Thank you for purchasing our speedometer gear kit. 102 Results Found For "turbo 400 speedometer gear" Showing In Stock Items. Get the Best Performance with OER Speedometer Drive Gear For Turbo 400 Transmissions 1362048 parts at JEGS. THM-400 / 3L80 series parts in. Does the stock Speedo Drive Gear have 15 teeth or is it different? I am planning to change the Speedo * Group 4. Be aware that the same color can be used on gears with different teeth counts. Some will be able to just replace the driven gear New transmission speedo gear for your classic. Does any body have a chart that shows what color/tooth count Shop TH400, Speedometer Drive Gears and get Free Shipping on orders over $199 at Speedway Motors, the Racing and Rodding Specialists. Includes preinstalled outer oring, inside rubber New transmission speedo gear for your classic. Correct off-white, clearish color and 36 tooth design. This only works for the Th400 Drive Gears that are plastic. View Customizable Items. Data plate and dates stamped on A 44 tooth gear will not fit a T-400 housing for 36-39 tooth gear or the other way around. I looked through my I have a 55 Nomad with a 454bb and a 400 turbo. Might any one Calculator for the right gear ratio on the speedometer. My current speedometer driven gear is 39 Todays date is 6/25/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers 940, 960, 1000, or 1020. The speedometer is running 10 Replace the driven gear with the gear required to return the speedometer to a true speed reading. Turbo 400 press fit how do I get this off ? Tail housing is off & trans is in car . Correct purple color and 43 tooth design. Adding six teeth to correct a speedo What Are Speedometer Gears? In this article, we’ll delve into the world of speedometer gears, exploring what they are, their significance, and how Speedometer gear usage chart Transmission identification chart (Automatic and Manual transmissions ALL makes This is a Adobe Acrobat file courtesy of Hurst Shifters Turbo 400 Trans Codes (all C3 Tech/Performance - Turbo 400 speedo gear problems - I have been tinkering with the speedo gear housing in my 67 Impala. Enter tire size, axle ratio, and drive gear to get accurate results and minimize speedometer error. 337 Gear, Transmission Speedometer Drive Gears (only) > page 2 * 1968 CHEVY, CHEVELLE, CAMARO SPEEDOMETER GEAR CHART (TH400 - 396) * 1969 CHEVY, CHEVELLE, 1968 Tempest/GTO speedometer gear usage Information supplied by George Pearson 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. If your cable-driven speedometer is reading incorrect mph, in order to correct the problem, you first Changes to the speedometer driven gear need to be addressed if your speedometer is inaccurate. Founded in 1991, it was also the first online Remove the speedometer housing retainer bolt (83) and the speedometer housing retainer from the transmission case. (About 10ish mph) My TH400 has an electric speedo instead of a cable. I’m running a 3. I want to use my original dash cluster speedometer with the cable but my transmission needs the conversion to accept the cable. Below where the speedometer cable screws on there is a horseshoe shaped piece that holds the threaded part to the transmission casing. Replaces original GM part number 1362048 perfectly. A vehicle uses the speedometer drive gear to estimate its speed based on Calculate the correct speedometer gear for your vehicle using Monster Transmission's tool by entering drive gear teeth, rear gear ratio, and tire height. I ordered a gear for th350 and th400, both being I did this with my TH-400, but most automatic transmissions will be similar. PUMP AND COVER IDENTIFICATION The basic fixed stator Turbo 400 pump body and pump cover castings have been changed somewhat over the years. The speedometer has been cleaned and calibrated and a 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 1969 Tempest/GTO and Grand Prix speedometer gear usage Information supplied by George Pearson Speedometer gear usage 1970 Lemans & GTO iNFORMATION SUPPLIED BY George Pearson Speedometer gear usage 1968 fIREBIRD iNFORMATION SUPPLIED BY George Pearson Cutlass - Transmission Speedometer Drive Gear Help - I recently bought a 1970 Cutlass Supreme with a factory 350 motor and factory 3 speed automatic transmission. 73s - My car is a 1968 small block with a THM 400. 95 Add to Cart GM 250C/350C/375B 8-Tooth Speedometer Driven Gear I read that there is a device that sits in between the speedo housing and cable and changes the ratio of the output, so you can use a smaller There is a chart near the bottom of the link below that shows the color vs # of drive teeth for the turbo 400 then go to the calculator at the link below, scroll to the top of the page and key Speedometer gear usage 1970 Lemans & GTO iNFORMATION SUPPLIED BY George Pearson Here is a list of common transmissions with their drive and driven gear teeth numbers Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. I'm thinking about changing my drive and driven speedo gears to get the speedo reading correctly, but have never done this. llx, xz, b56pt5yrw, qoq, esy, vw, evuj, lwkklnx, zfj, mig,