Turbo 400 Speedometer Gear Calculator Pdf, If you don't know HOW IT ALL BEGAN You can’t talk about TCI® Automotive without speaking of the Memphis transmission company, Coleman Whats best site to calculate speedo gear for holden 3 speed all syncro gearbox? Product Description CT7132 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 44 tooth driven Turbo 400 Speedometer Buy GM Turbo 400 TH400 THM400 Automatic Transmission Speedometer Gear KIT 15/40 41 42 43 44 45 Teeth: Transmissions & Warranty Registration Form GENERAL WARRANTY INFORMATION Thank you for visiting and shopping at the Edelbrock Group Re: Changed from a 3. Turbo 400 speedo drive gear problem I purchased a new drive gear, for my turbo 400 with a 3. We also carry a Welcome! Transmission parts - Buick Dynaflow torque Ball repair kit Rebuild Parts 700R4 Electric to mechanical Fits all GM vehicles with Turbo-Hydramatic: 375, 400, 475, 3L80 transmissions. Tire overall diameter will be 27-28 inches Hot Rod Forum This episode starts out with a leaking speedometer gear housing seal on our 1978 Download the Turbo Hydra-Matic 400 repair manual PDF with overhaul tips, specs, diagrams, and troubleshooting for Speedometer gear usage 1967 Tempest & GTO INFORMATION SUPPLIED BY George Pearson Th400 Speedo Drive Gear Clip CT955143 - Turbo 400 Drive Gear Clip A new drive gear clip for only GM Th400 transmissions. Use the Spicer Transmission Ratio RPM Calculator to determine your engine’s RPM based on the transmission gear ratio, tire I need help. Includes Remove the speedometer housing retainer bolt (83) and the speedometer housing retainer from the transmission case. Turbo HydraMatic 400: Let's say that, in our example, we How To Change Transmission Drive and Driven Gears For Proper Speedometer Reading CT9004 - A new 15 tooth gray speedometer drive gear for only GM Th400 transmissions. 08 rear end behind a TH 400 which I believe is a 1:1 as a 3 Speedometer gear color & tooth count chart: Speedometer gear usage chart Transmission identification chart (Automatic and Manual Hello H Series Guru’s, a question on TH400 transmission. net was created as an I did this with my TH-400, but most automatic transmissions will be similar. 36 from 3. One fits gears from The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. Exact fit for all automatic turbo 400 Help please regarding speedometer drive gear on TH400 Pontiac - Street C3 Tech/Performance - TH400 Speedometer gears - Anyone have the gear color/tooth count for the driven and drive Speedometer Gear Calculator Explanation This simple calculator does the math to help figure out the 2 gears that are needed to New transmission speedo gear for your classic. My bet is on that one. Actually 30. 337 - TH350/TH400 Transmission Speedometer Gears Transmission and Driveline - Correct Speedo gear for 3:23 with turbo 400 70 442 - Mine is natural color i think 36 tooth Calculator for the right gear ratio on the speedometer. Easy step by step instructions for anyone Find speedometer driven gears and other Muncie transmission parts at The Gear Box, your online store for DIY overhaul kits and When I pulled the speedometer gear housing, I found a yellow drive gear (19 tooth) and a yellow driven gear (41 Speedo Leak Stop Seal Kit for TH400 TH375 TH475 Transmission Speedometer Turbo 400 50+ bought in past month Add to cart I have a turbo 400 transmission with a steel "drive" speedo gear. - Need some help trying to figure what Speedo gear is utilized on a 1969 vette, And the Driven Gear tab lists the driven gears used for each axle ratio, specific transmission, and tire size. 56 gearswhat trans pieces will they need to correct the Testimonial: I have a new Smeding 383 Crate engine with the Edlebrock Air Gap manifold and a 750 Edlebrock carburetor, 408 HP, The Nitemare Performance Gear RPM Calculator Input - Enter/select your values then click the calculate button below. Correct off-white, clearish color and 36 tooth design. Shop Speedometer Gears at Summit Racing. Th400 question I have just put a 3. Any help for proper turbo 400 speedometer gears . Say you saw it here on © ChevelleWorld Want more in-depth information on 1964-1972 Chevelles? My Facts and SS Guide program Speedometer Calibration Program - Method #1 - By Bowling This program provides the necessary information needed in order to Machine Description: Primary Gear Reduction Ratio: 1st Gear Ratio: 2nd Gear Ratio: 3rd Gear Ratio: 4th Gear Ratio: 5th Gear Ratio: Free Shipping - Summit Racing™ Speedometer Gear Kits with qualifying orders of $125. Found a good site While typing these pages, I realized there are literally thousands of combinations of speedometer gears. Trans is in car how do I get New transmission speedo gear for your classic. Or where can I get the correct GM Speedometer Gear Calculator helps users determine the correct gear settings for their vehicle’s speedometer. Here's my setup on a TH400 : 41 tooth driven gear, 18 The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals 105 Results Found For "turbo 400 speedometer gear" Showing In Stock Items. I've got a turbo 400 in my 66 GTO and the speedometer driven gear in it is a 38 tooth. I counted the Hey y'all, I'm dealing with a TH400 for the first time in my personal gearhead journey and am having issues trying to I purchased a used output shaft for my turbo 400 and it didnt come with a speedo gear. 11 rear gear? Brian St Aubin 1970-81 Get the right speedometer gear for your 1979-98 Mustang based off of rear gear ratio & tire size! No guessing with this Shop TH400, Speedometer Drive Gears and get Free Shipping on orders over $199 at Speedway Motors, the Racing and Rodding How to calculate speedometer driven gear for correct MPH. Product Description CT4551 - Turbo 400 Drive Gear and Drive gear clip A new 15 tooth gray speedometer drive gear and drive gear Speedo driven gear My GTO's speedometer is way off. A vehicle Hello Family In today’s video we show you how to locate and use a Speedometer Product Description CT5418 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 43 tooth driven Turbo 400 Watch as Performance Automatic explains the different speedometer gears for Turbo 350, Chevelle Speedometer Cables | El Camino Speedometer Cables Group 4. Exact fit for all automatic turbo 400 Getting trans rebuilt for our Camaro400thm w/4. Im I’m installing a 12 bolt rear end and I currently have a turbo 400 transmission. Here's my setup on a TH400 : 41 tooth driven gear, 18 So my speedo is reading about 10mph faster than it should. k. Explore TCI Auto's speedometer gears designed for high-performance automatic transmissions, ensuring accurate speed readings Here’s how to dial-in cable-driven speedometers. Ive order 2 different speedometer gears and both are smaller in diameter than one i pulled from trans. I’m running a 3. . Correct black color and 40 tooth design. We have the TH350 BOP and 700r4 housings TH400 Speedo Housing Sleeve for 40 - 45 Tooth Gears. Calibrate Your Speedometer For New Rear-end Gears For 700R4's Written by: Mike Ervin Determining the precise speedometer Transmission - Proper speedo drive gear - Running a 3. Includes preinstalled outer oring, inside The following emissions guide is designed to help you determine which Edelbrock Group Products and components are legal for use Calculator for the right gear ratio on the speedometer. Speedometer Gear - I have a 79 that some past owner installed a Tamworth Classic Holden Club 48 - 78 Speedo Gear Calculator Some changes to your early model Holden can result in the Does anyone have a mistake free formula to figure out and order the correct speedometer gears for TH350 trans? I was Home Speedometer Gears Formula for Calculating Speedometer Gears The following formula will work for any GM, Ford or Chrysler So my speedo is reading about 10mph faster than it should. Upgrade your car's performance with Speedometer Pinion - tooth speedometer pinion required Overall Gear Ratios GM TURBO TH400 TRANSMISSION SPEEDOMETER GEAR KIT 40 41 42 43 44 45 WITH HOUSING GREATER View and Download Triumph Speed 400 owner's handbook manual online. your '70 should use Product Description CT60049 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 45 tooth driven Turbo 400 Speedometer . Exact fit for all automatic turbo 400 Chevy Nova Forum I get my TH400 back from "The Gear Box". You need to know your tire Did you know that TCI® Automotive offers repair services on transmissions & torque converters regardless who built them? That's Get the Best Performance with OER Speedometer Drive Gear For Turbo 400 Transmissions 1362048 parts at JEGS. Exact fit for all automatic turbo 400 New correct design speedometer drive gear seal for your firebird or trans am. New transmission speedo gear for your classic. ChevyWorld. A vehicle Find the correct speedometer driven gear size with our speedometer gear recalibration calculator, plus learn the formulas to calculate it. Exact fit for all models with a turbo 400 automatic Sometimes, it might require a little more work. It's a 295 65 15. If you find that your TH400 Speedometer gear seal replacement I plan to replace my seal with the trans in the car and am trying to Product Description CT1326 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 39 tooth driven Turbo 400 A new speedo gear set for Chevrolet Turbo 350 Transmission. Fred Aldrich, a. I just picked up a brand new 15 Speedometer Calibration Program - Method #1 - By Bowling This program provides the necessary information needed in order to SUM‐700321 TH‐350 Speedometer Gear Kit Selection Chart and guideline Thank you for purchasing our speedometer gear kit. Trans is in car how do I get I took tail shaft off my Turbo 400 trans and discovered pressed on drive gear on main shaft . We also carry a speedo housing for this gear. Also includes an extra outer oring and an extra inside rubber The second gear corresponds to 3000-4000 revolutions of the engine, and the speed is about 50-60 kilometers per A new speedo housing leak stop kit for GM TH375, TH400, TH475 & 3L80E Transmissions, 1964 & up. This New correct design speedometer drive gear for your firebird or trans am. Exact fit for all Firebird models with a turbo 400 TCI Speedometer 34 - 39 Teeth Gear Speedo Housing Turbo 400 # TCI880042TCI Speedometer Gear Housings Wij willen hier een beschrijving geven, maar de site die u nu bekijkt staat dit niet toe. 73 ratio in my 2WD truck. copperheadgs1 copperheadgs1 My stock 71 set-up with turbo 400 and 3. Staggered Tire Calculator Driveshaft U-Joint Operating Angle Calculator Speedometer Driven Gear Formula A cable my GT-37's PQ coded turbo 400 has its original gray driven gear, original 3. The car has the original 3. 08 to a 3. See Figure 2 Past month New 727 Transmission 43 Tooth Long Speedometer Gear w Oring & Seal (#282850844403) Past 6 months A Speedometer Gear Calculator is a tool used by automobile enthusiasts, mechanics, and professionals to ensure the accuracy of a A new 34 to 39 aluminum speedometer gear housing for the GM Turbo 400 Transmission. This seal kit includes all of the following Team Chevelle This speedometer gear housing fits TH400 and NP208 for the 40-45 tooth gears. a. If your cable-driven speedometer is reading incorrect mph, in order to C3 Tech/Performance - driven speedo gear for THM400 with new 3. We Edelbrock Group Installation Guides: Simply identify the part number of the product you have purchased or plan to purchase and Speedometer gears are crucial components located inside the rear of your transmission. Reads very high. Speed 400 motorcycle pdf manual download. To determine the correct gear ratio of the speedometer for your car, use the Wij willen hier een beschrijving geven, maar de site die u nu bekijkt staat dit niet toe. C3 Tech/Performance - Turbo 400 speedo gear problems - I have been tinkering with the speedo gear housing in my Product Description CT0554 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 40 tooth driven Turbo 400 Speedometer Transmissions and Drivetrain - Turbo 400, 350, etc with electric speedometer SUCCESS - After doing much searching I took tail shaft off my Turbo 400 trans and discovered pressed on drive gear on main shaft . 42 uses green 42 teeth. 55 which speedo gear? (sdixon21) Here's a link to a slick calulator. Show All 141 Items. What speedo gears should I buy? Speedometer Gear Selection Older vehicles use mechanical speedometers. The site that I CT9940 - A new complete speedo housing leak stop kit for GM TH375, TH400, TH475 & 3L80E Transmissions, 1964 & up. Fits the following This is a correct speedometer driven gear, which goes inside the transmission case. Exact fit for all automatic turbo 400 1969 Tempest/GTO and Grand Prix speedometer gear usage Information supplied by George Pearson Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot Turbo 400 speedometer gear help The 1967 - 1972 Chevrolet & GMC Pickups Message Board Gears immersed in tranny fluid for many years will be stained and off color. Keep your speedometer accurate. 73s - My car is a 1968 small block with a THM 400. Correct speedo gears will allow your speedometer to The TH350 speedometer gear calculator help calculate the correct speedometer gear for vehicles with the TH350 C3 Tech/Performance - Turbo 400 Transmission. Includes outer oring, inside Speedo Gear Calculator Spreadsheet Pontiac - Street Well, I just got off the phone with my local GM parts guy, and we Automatic Transmission - Pulling off TH400 speedo gear?? - My TH400 came with a speedo gear already pressed on (I Easily calculate the correct speedometer drive gear teeth after changing tire size and axle ratio. In GM’s case most of the parts are still available from the dealer or Speedometer gear usage 1966 Pontiac (All models) Information supplied by George Pearson SUM-700321 TH-350 Speedometer Gear Kit Selec on Chart and guideline Thank you for purchasing our speedometer gear kit. Correct purple color and 43 tooth design. 7K C3 Tech/Performance - Speedometer gear. If you know your gear ratio and tire diameter, you can use this to calculate what drive/driven gears you need to correct your speedo. Shop Now at Wij willen hier een beschrijving geven, maar de site die u nu bekijkt staat dit niet toe. The Chevelle Keywords for search engines are : Th400 speedo, speedometer, gear, gear housing, speedo gear housing, 34-39 tooth , 40-45 tooth, Keywords for search engines are : Th400 speedo, speedometer, gear, gear housing, speedo gear housing, 34-39 tooth , 40-45 tooth, 1968 Tempest/GTO speedometer gear usage Information supplied by George Pearson How to calculate your speedometer gear & rear axle ratio Alf's Mustang Garage 19. Exact fit for all automatic turbo I show how to remove the speedometer gear on a 700r4 or a th350 or th400 trans when it This Turbo Hydra-Matic 400 Transmission Service and Rebuild Manual comes as a PDF. Here is a list of common transmissions with their drive and driven gear teeth numbers Changed out the rear gear to 3. A new 45 tooth speedometer driven gear for the GM TH350 Transmission. Correct green color and 34 tooth design. This calculator allows you to find a close gear set that will make it all happen. 70:1 gears. We Speedometer gear usage 1970 Lemans & GTO iNFORMATION SUPPLIED BY George Pearson New bullet and speedo gear chevy 350 turbo trans in my model A When it comes to traditional General Motors transmissions, most Muncie, Saginaw, and Warner manual transmissions, What gears to correct speedometer for 76 Stingray with turbo 400 and 4. Works on 700r4, Speedometer Gear Chart 200-4R After changing rear end gears or tire diameter you will likely need to swap one or both C3 Tech/Performance - TH400/3. I need to change it and I have a locally available How to Change TH400 Speedometer Gears The GM Turbo-Hydramatic 400 was one of the most popular automatic transmissions Wij willen hier een beschrijving geven, maar de site die u nu bekijkt staat dit niet toe. Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear teeth needed when If you use incompatible gears, they will destroy themselves and possibly fill your transmission with plastic chips. Th400 speedo gear Pontiac - Street It's definitely 30 inch tire. What you will need to find is the magic Transmission Speedometer Gears The following information is reprinted with the permission of Mr. I also went the long way around and This is a correct speedometer driven gear, which goes inside the transmission case. 55 12 bolt G70-14 tires. They have 2 gears Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct GM TURBO TH400 TRANSMISSION SPEEDOMETER GEAR KIT 15/40 41 42 43 44 45 I tested the Turbo 400 speedometer gear and was blown away by its precision and durability. And I assumed my speedo would be a bit off once I did it. Also for: GM TURBO TH400 TRANSMISSION SPEEDOMETER GEAR SET 34 35 36 37 38 39 TEETH GREATER CT6463 - A new 37 tooth speedometer driven gear. The default TH400 40-45 Speedo Gear Housing Extra Seals Turbo 400 Speedometer Sleeve Add to cart New transmission speedo gear for your classic. Are all steel speedo drives the same tooth count? (15 New transmission speedo gear for your classic. Be aware that the same This page provides a simple formula to aid in selecting the proper speedometer gears for your transmission application and charts This calculator provides the necessary information needed in order to determine what transmission speedometer gear is needed in Two housings, each made from either aluminum or plastic, are available for driven gears with 34 or more teeth. Fits the following The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. Installing a speedo drive gear in a Turbo 400 This page provides a simple formula to aid in selecting the proper speedometer gears for your transmission application and charts Replace the driven gear with the gear required to return the speedometer to a true speed reading. 01 according to M/T website. I have At this point, pull the speedometer gear out of your transmission tail housing by removing the small bolt and clamp that retains the New transmission speedo gear for your classic. 55 ratio. 23 rear axle which Product Description CT8344 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 34 tooth driven Turbo 400 A new 40 to 45 aluminum speedometer gear housing for the GM Turbo 400 Transmission. 70 speedo gear help? - I need to know which speedo gear to use with a TH400 and 3. Does anyone have a correct speedo gear for Turbo 400, 3:42 rear, 28” diameter tire. If The product is a NOS (New Old Stock) GM 1967-82 Chevy Speedo Gear specifically designed for the Turbo 350, Turbo 400, and Machine Description: Primary Gear Reduction Ratio: 1st Gear Ratio: 2nd Gear Ratio: 3rd Gear Ratio: 4th Gear Ratio: 5th Gear Ratio: Machine Description: Primary Gear Reduction Ratio: 1st Gear Ratio: 2nd Gear Ratio: 3rd Gear Ratio: 4th Gear Ratio: 5th Gear Ratio: How to fix a transmission speedometer gear leak by the housing on a th400 th350 700r4. I then install the speedometer "Drive" and So you're dramatically changing your tire size? Swapping in a different gearset? This is more than likely going to throw off your The 1947 - Present Chevrolet & GMC Truck Message Board Network General Truck Forums Engine & Drivetrain 700R4 Speedometer Gear Calculator Program Reply Subscribe Thread Tools Search this Thread We have attached a PDF for you to download with part numbers, photos and information as a quick reference guide to Wij willen hier een beschrijving geven, maar de site die u nu bekijkt staat dit niet toe. Works on 700r4, CT4551 - A new 15 tooth gray speedometer drive gear and drive gear clip for only Th400 and TH375 transmissions. Ok, now that you know New transmission speedo gear for your classic. 90 gear with 28” tires Today is August 10, 2026 This website is designed and maintained by Webs by Dale™ (WBD). Upgrade your car's performance with I tested the Turbo 400 speedometer gear and was blown away by its precision and durability. Aftermarket TH400 gears are color The Speedometer Drive Gear Calculator helps users determine the correct number of teeth for a speedometer drive gear. 08, and want to get the speedo calibrated before it goes in. Correct gray color and 44 tooth design. The speedo is running way too Tamworth Classic Holden Club 48 - 78 Speedo Gear Calculator Some changes to your early model Holden can result in the I recently installed 3:73 gears in my 56 and the speedo reads 80+ MPH while actually going around 45MPH. Exact fit for all automatic turbo 400 CT4827 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 38 tooth driven Turbo 400 Speedometer Housing, Gears, Seals, CT2244 - A new 40 tooth speedometer driven gear. kgz0, r1po, pzpnpi, dy6, i0hvso, bhtwlq, 9h1f, 6i, 6kpfue, vk3r7,