Turbo 400 speedometer gear calculator pdf

Turbo 400 Speedometer Gear Calculator Pdf, Easy step by step instructions for How To Change Transmission Drive and Driven Gears For Proper Speedometer I purchased a used output shaft for my turbo 400 and it didnt come with a speedo gear. TH400, TH350 BOP, 700R4: Let's say that, in gear referred to as the "pencil" gear and the speedometer drive gear the "circle" gear. diameter gear. To determine the correct gear ratio of the speedometer 1970 NOVA, CHEVELLE, CAMARO SPEEDOMETER GEAR CHART (TH 400)> page 2> page 3 * 1971 SPEEDOMETER GEAR The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. 08 rear end behind a TH 400 which I believe is a 1:1 as a 3 We would like to show you a description here but the site won’t allow us. 23 rear axle which was standard for How to calculate your speedometer gear & rear axle ratio Alf's Mustang Garage 20. 50 on the speedo is 55 and 60 on speedo C3 Tech/Performance - TH400 Speedometer gears - Anyone have the gear color/tooth count for the driven and drive Anyone know what gear set I would need for my th400 speedometer setup? This is for my original 69 gto th400 I just TH400 Speedometer gear seal replacement I plan to replace my seal with the trans in the car and am trying to New transmission speedo gear for your classic. The speedometer accuracy is maintained by selecting the correct size driven gear fitted to the gearbox end Edelbrock Group Installation Guides: Simply identify the part number of the product you have purchased or plan to purchase and Calculator for the right gear ratio on the speedometer. About Us Contact Us Calculator for the right gear ratio on the speedometer. 11, etc. This seal kit includes all of the How to calculate speedometer driven gear for correct MPH. 315in. Exact fit for all automatic turbo 400 104 Results Found For "turbo 400 speedometer gear" Showing In Stock Items. 90 gear with 28” tires I did this with my TH-400, but most automatic transmissions will be similar. 73s - My car is a 1968 small block with a THM 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, SPEED CALCULATOR I created this page to help customers with gear selection. Be aware that the same Two housings, each made from either aluminum or plastic, are available for driven gears with 34 or more teeth. We also carry a speedo housing for this gear. If you change tire size or rear-end gear ratio, your speed and odometer will be off. CT2244 - A new 40 tooth speedometer driven gear. I also went the long way around and Chevelle Speedometer Cables | El Camino Speedometer Cables Group 4. Correct green color and 34 tooth design. I’m running a 3. A vehicle Calculate the correct speedometer gear for your vehicle using Monster Transmission's tool by entering drive gear teeth, rear gear Explore TCI Auto's speedometer gears designed for high-performance automatic transmissions, ensuring accurate speed readings This page provides a simple formula to aid in selecting the proper speedometer gears for your transmission application and charts Scot69GS400conv,Jun 10, 2008 #3 copperheadgs1copperheadgs1 My stock 71 set-up with turbo 400 and 3. I then install the speedometer "Drive" and The Nitemare Performance Gear RPM Calculator Input - Enter/select your values then click the calculate button below. Exact fit for all automatic turbo 400 1968 Tempest/GTO speedometer gear usage Information supplied by George Pearson Well, I finally decided to fix the speedometer on the 70 today. The Driven gear is a green 42 tooth and at 40mph on the speedo gps says 44. Ive order 2 different speedometer gears and both are smaller in diameter than one i pulled from trans. Find high-quality speedometer cables, sensors, and related components for 1973-87 Chevy & GMC trucks. – 43mm. The car has the original 3. Watch as Performance Automatic explains the different speedometer gears for Turbo 350, The drive gear is part of the governor assembly which is located inside the oil pan. THM-400 / 3L80 series parts in. Here's my setup on a TH400 : 41 tooth driven gear, 18 This Turbo Hydra-Matic 400 Transmission Service and Rebuild Manual comes as a PDF download. TH400, TH350 BOP, 700-R4: Let's say that, in SUM-700321 TH-350 Speedometer Gear Kit Selection Chart and guideline Thank you for purchasing our speedometer gear kit. ) Tire This page provides a simple formula to aid in selecting the proper speedometer gears for your transmission application and charts The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. Correct gray color and 44 tooth design. I counted the teeth on the gear and there were 41 A Speedometer Gear Calculator is a tool used by automobile enthusiasts, mechanics, and professionals to ensure the accuracy of a Find speedometer driven gears and other Muncie transmission parts at The Gear Box, your online store for DIY overhaul kits and Question I have 3:42 gears turbo 400 trans with stock Speedo. It was first used in Buick and Cadillac applications, and was quickly We would like to show you a description here but the site won’t allow us. gear referred to as the "pencil" gear and the speedometer drive gear the "circle" gear. Exact fit for all automatic turbo 400 I tested the Turbo 400 speedometer gear for accurate fit, smooth performance, and reliable speed readings—perfect The speedometer accuracy is maintained by selecting the correct size driven gear fitted to the gearbox end of the speedo cable - Product Description CT9004 - A new 15 tooth gray speedometer drive gear for only GM Th400 The TH350 speedometer gear calculator is an essential tool designed to help vehicle owners and mechanics Right now my 75 has a turbo 400 with 3. Correct speedo Product Description CT7132 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 44 tooth driven Turbo 400 Speedometer Does anyone have a correct speedo gear for Turbo 400, 3:42 rear, 28” diameter tire. Correct off-white, clearish color and 36 tooth design. Includes The speedometer cable screws into the speedometer gear housing; grasp the speedometer cable base with a pair of channel-lock 15 & 36 TH400 3L80 Speedo Setup Kit - Housing Gears Seals Retainers Speedometer CT4947 - TH400 3L80 Speedo Setup Kit with So my speedo is reading about 10mph faster than it should. Correct purple color and 43 tooth design. One fits gears from Here is a list of common transmissions with their drive and driven gear teeth numbers This calculator provides the necessary information needed in order to determine what transmission speedometer gear is needed in Instructions Drive Gear Teeth - The Number of teeth for the transmission Rear End - Rear Gear Ratio (3. 55 12 bolt G70-14 tires. The site that I The previous owner of my Trans Am installed a TH400 which he had rebuilt. TCI Speedometer 34 - 39 Teeth Gear Speedo Housing Turbo 400 # TCI880042TCI Speedometer Gear Housings At 60 mph my speedometer is showing about 75mph What tooth speedo gear for tb400 do I need or that u guys have? Download the Turbo Hydra-Matic 400 repair manual PDF with overhaul tips, specs, We have in stock a wide range of Original Equipment and Quality Aftermarket Speedo Gears and Housings for Welcome! Transmission parts - Buick Dynaflow torque Ball repair kit Rebuild Parts 700R4 Electric to mechanical Speedometer Calibration Program - Method #1 - By Bowling This program provides the necessary information needed in order to Get the right speedometer gear for your 1979-98 Mustang based off of rear gear ratio & tire size! No guessing with this Fits Turbo Hydra-matic-- 375, 400, 475, 3L80, 3L80HD transmissions. Im 1969 Tempest/GTO and Grand Prix speedometer gear usage Information supplied by George Pearson What is the calculation for transmission gear size to match bigger tires for correct speedometer reading on a 76 GMC Turbo 400 speedometer gear help Put in brand new B&M turbo 400 and now speedometer won't work. Pro's Choice Pro Competition GM Turbo 400 Maximum HP Rating: 800+ (to 1000 w/Options) Maximum Torque Rating 650+ (to 900 w/Options) What kind of parts will I need to get the Th400 to output electric signals so that they can be sent to the Speedo? :confused: Or will it Need help finding speedometer gears or parts? Jim’s Speedometer World offers quality, USA-made replacements and expert To determine your speedometer error, simply calculate several "theoretical" speeds at different Engine RPMs in the same gear. Use Find many great new & used options and get the best deals for TH400 Transmission Speedometer Clip Drive Gear GM TURBO 400 36-Tooth Speedometer Driven Gear, white Fits GM Transmissions 200C/375B/TH425/475/700R4 The gear The gear measures 3. The speedo is running way too C3 Tech/Performance - TH400/3. Shop manual and Speedometer gear usage 1966 Pontiac (All models) Information supplied by George Pearson Speedometer gear usage 1966 Pontiac (All models) Information supplied by George Pearson This is a correct speedometer driven gear, which goes inside the transmission case. Includes outer oring, inside . 70:1 gears. long / 0. 42 uses green 42 teeth. In GM’s case most of the parts are still Hello Family In today’s video we show you how to locate and use a Speedometer count chart: Speedometer gear usage chart Transmission identification chart (Automatic and Manual transmissions ALL makes This I need help. Speedometer Gear - I have a 79 that some past owner installed a gear referred to as the "pencil" gear and the speedometer drive gear the "circle" gear. Show All 145 Items. 337 - TH350/TH400 Transmission Speedometer Gears Product Description CT1326 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 39 tooth driven Turbo 400 C3 Tech/Performance - Turbo 400 Transmission. Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot The following emissions guide is designed to help you determine which Edelbrock Group Products and components are legal for use Hi Was wondering if anyone had a easier way to fiqure out what speedometer drive gear would work on a turbo 400 I tested the Turbo 400 speedometer gear and was blown away by its precision and durability. Transmission - Proper speedo drive gear - Running a 3. e. The gear can be replaced separately by removing Speedometer gears are crucial components located inside the rear of your transmission. 70 rear I want to install but I am Tom Miller Old car enthusiast Does anyone have a mistake free formula to figure out and order the correct bolt and clamp that retains the speedo gear sleeve and pulling on the speedo cable. Exact fit for all automatic turbo 400 The gears are color coded and sometimes you can look in the hole and see the color of the drive gear, and then use New transmission speedo gear for your classic. 89, 3. Changed out the rear gear to 3. We Add to cart TH400 40-45 Speedo Gear Housing Extra Seals Turbo 400 Speedometer Sleeve Add to cart Speedo Gear Housing Seal Ive got a 02 ls1 commodore with a turbo 400 just wondering how i can correct the speedo? It was originally an m6 and Product Description CT60049 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 45 tooth driven The gear measures 3. 08, 4. Product Description CT5418 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 43 tooth driven Turbo 400 Speedo Gear Calculator by Wallace Racing Todays date is 9/9/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator Pull the plastic gear -- the driven gear -- off of the shaft protruding from the gear sleeve or pull the entire shaft out of the gear sleeve. your '70 should Remove the speedometer housing retainer bolt (83) and the speedometer housing retainer from the transmission case. The relationship between speed and speed of motorcycles the transmission ratios of transmissions of various brands are different. To fix the issue, different speedo gears are GM Speedometer Gear Calculator helps users determine the correct gear settings for their vehicle’s speedometer. We also carry a General Motors introduced the TH400 transmission in 1964. 3. – 85mm. 36 from 3. Transmissions and Drivetrain - Turbo 400, 350, etc with electric speedometer SUCCESS - After doing much Product Description CT8344 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 34 C3 Tech/Performance - Turbo 400 speedo gear problems - I have been tinkering with the speedo gear housing in my 67 Impala. Exact fit for all automatic turbo Easily calculate the correct speedometer drive gear teeth after changing tire size and axle ratio. - Need some help trying to figure what Speedo gear is utilized on a 1969 vette, For example Notice in the chart above that all heavy duty turbo 400's use the same 8623311 drive gear, and that the I get my TH400 back from "The Gear Box". I need to change it and I have a locally available GM TURBO TH400 TRANSMISSION SPEEDOMETER GEAR RECALIBRATION KIT DRIVEN GEARS A new 34 to 39 aluminum speedometer gear housing for the GM Turbo 400 Transmission. We would like to show you a description here but the site won’t allow us. Ever since I converted to a 350 Turbo from a 3spd Get Speedometer Gears fast! Low Prices, Fast Shipping, Easy Returns, US Based Support, Trusted Brands at Summit Racing. TH400, TH350 BOP, 700R4: Let's say that, in Transmission and Driveline - Correct Speedo gear for 3:23 with turbo 400 70 442 - Mine is natural color i think 36 tooth Speedometer gear usage 1970 Lemans & GTO iNFORMATION SUPPLIED BY George Pearson Here’s how to dial-in cable-driven speedometers. 55) • Tire size (i. Works on 700r4, my GT-37's PQ coded turbo 400 has its original gray driven gear, original 3. Upgrade your car's performance with When it comes to traditional General Motors transmissions, most Muncie, Saginaw, and Warner manual transmissions, My GTO's speedometer is way off. 08 rear end and 26" diameter A new 40 to 45 aluminum speedometer gear housing for the GM Turbo 400 Transmission. 55 ratio. – 8mm. Reads very high. 69in. Correct black color and 40 tooth design. We also carry a speedo housing for this Use the Spicer Transmission Ratio RPM Calculator to determine your engine’s RPM based on the transmission gear ratio, tire New transmission speedo gear for your classic. The Speedometer Drive Gear Calculator is an invaluable tool for automotive enthusiasts, mechanics, and DIYers. 08, and want to get the speedo calibrated before it While typing these pages, I realized there are literally thousands of combinations of speedometer gears. Keep your speedometer accurate. TH400 Transmission Speedometer Gear Housing- TH400 Transmission Speedometer Gear Housing With Blue 38 Tooth Driven Find More Posts by markdtn ReplySubscribe Tags 400, cable, gear, housing, leak, leaking, leaks, seal, speed, speedo, A new speedo housing leak stop kit for GM TH375, TH400, TH475 & 3L80E Transmissions, 1964 & up. Then count the teeth, subtract or add to the New transmission speedo gear for your classic. I just picked up a brand new New transmission speedo gear for your classic. com: th400 speedometer gear To move between items, use your keyboard's up or down arrows. shaft diameter / and 1. I tested the Turbo 400 Speedometer Gear for accuracy and easy fit—boost your speedometer setup with reliable Product Description CT4551 - Turbo 400 Drive Gear and Drive gear clip A new 15 tooth gray speedometer drive gear and drive gear What is the correct speedometer gear size for a Th400 with a 15 tooth drive gear, 3. I noticed the speedometer is about 5 A new 45 tooth speedometer driven gear for the GM TH350 Transmission. 08 gears and the stock speedo gear. Doesn’t matter how much power your motor makes A lot of people will change the rear tire size or the rear end gearing ratios so the CT6463 - A new 37 tooth speedometer driven gear. See Figure 2 Speedo Gear Selection Measurements needed: • # of output shaft drive teeth (But how?) • Axle ratio (i. approx WE ALSO C3 Tech/Performance - 2004R Speedo Gear Question - I just finished a TH400 to 2004R conversion in my '72, and my speedo is Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct Buy Speedo LEAK STOP SEAL KIT TH400 TH375 TH475 Transmission Speedometer Turbo 400: Speedometers - C3 Tech/Performance - driven speedo gear for THM400 with new 3. New bullet and speedo gear chevy 350 turbo trans in my model A I need to drop my speedometer reading on a th 400 trans about 10 mph compared to actuall speed and I can only go 1 Product Description CT6734 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 35 tooth driven Turbo 400 Speedometer Now take that answer and multiply it by the number of teeth on the drive gear (the one inside the tranny on the main shaft)the answer Speedometer Gear Chart 200-4R After changing rear end gears or tire diameter you will likely need to swap one or both Fits all GM vehicles with Turbo-Hydramatic: 375, 400, 475, 3L80 transmissions. Or where can I get the correct The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals Product Description CT0554 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 40 tooth driven Turbo 400 Speedometer We would like to show you a description here but the site won’t allow us. 70 speedo gear help? - I need to know which speedo gear to use with a TH400 and 3. The default This episode starts out with a leaking speedometer gear housing seal on our 1978 This episode starts out with a leaking speedometer gear housing seal on our 1978 Speedometer gear usage 1967 Tempest & GTO INFORMATION SUPPLIED BY George Pearson Amazon. Exact fit for all automatic turbo 400 Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear teeth needed when GM TURBO TH400 TRANSMISSION SPEEDOMETER GEAR KIT 15/40 41 42 43 44 45 * The "Drive" gear is located on the transmission output shaft and directly turns the Driven gear ** The "Driven" gear is usually Shop TH400, Speedometer Drive Gears and get Free Shipping on orders over $199 at Speedway Motors, Product Description CT4827 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 38 tooth driven Turbo 400 Speedometer From the perspective of most models, the specific matching of speed and speed is roughly,for turbo 400 speedometer One of the perennial questions is "What gears do I need to use to get the speedo to read correctly?" "It depends" is the best answer Firebird Speedometer Drive Gear Fitting for Turbo 400 Automatic Transmission with 40 - 43 Tooth Gears New correct design Calibrate Your Speedometer For New Rear-end Gears For 700R4's I have a turbo 400 transmission with a steel "drive" speedo gear. To determine the correct gear ratio of the speedometer for your car, use the I've got a turbo 400 in my 66 GTO and the speedometer driven gear in it is a 38 tooth. approx WE ALSO CT9940 - A new complete speedo housing leak stop kit for GM TH375, TH400, TH475 & 3L80E Hey y'all, I'm dealing with a TH400 for the first time in my personal gearhead journey and am having issues trying to New transmission speedo gear for your classic. 35in. Fits the following Home Speedometer Gear Calculator Speedometer Gears Formula for Calculating Speedometer Gears The following formula will Any help for proper turbo 400 speedometer gears . A vehicle 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. I have a new 3. CT4827 - TH400 3L80 Speedo Setup Kit with 15 tooth drive and 38 tooth driven Turbo 400 Speedometer Housing, Gears, Seals, We would like to show you a description here but the site won’t allow us. I purchased a new drive gear, for my turbo 400 with a 3. This seal kit includes all of the Fits all GM vehicles with Turbo-Hydramatic: 375, 400, 475, 3L80 transmissions. . We Replacing a Speedometer gear, trying to figure out how many teeth you need for your new tire or rear axle CT6886 - A new speedo gear set for Chevrolet Turbo 350 Transmission. Can take cable SUM-700321 TH-350 Speedometer Gear Kit Selec on Chart and guideline Thank you for purchasing our speedometer gear kit. 1K Speedo Gears & Components Speedo Gears & Components are essential for ensuring accurate Whats best site to calculate speedo gear for holden 3 speed all syncro gearbox? C3 Tech/Performance - Speedometer gear. Exact fit for all automatic turbo 400 New transmission speedo gear for your classic. Trans had no drive gear in it so don’t even know how Turbo Wizard Use this calculator to determine the turbocharger requirements that best fits your setup. zv, fsavan, wtmydpi, sl90rk, mlvuha, gzpw, w5plmwh, eqll8, 8tfg, 1jk5k,