Speedometer gear calculator th350

Speedometer Gear Calculator Th350, net was created as an A new complete mechanical speedo set up for TH350 and 700R4 transmissions. Doesn’t matter how much power your motor makes Locate information on Edelbrock Groups return and exchange policies for ALL orders purchased directly from Edelbrock. We can customize this for you. It We would like to show you a description here but the site won’t allow us. #shop #mechanic #transmission TCI Auto Technical Resources The following collection of technical information should provide a basic understanding of everything When I do axle regears I will take the old ratio vs new ratio and figure out the percentage difference and then apply Today is August 23, 2026 This website is designed and maintained by Webs by Dale™ (WBD). Heavy Duty Plastic, White gear ONLY fits I go ahead and replace my speedo gear on the tail shaft of my 4l60 transmission in my Transmissions and Drivetrain - Speedometer gear swap 2. com! Free shipping over $300, fast delivery & Bigger rear tires on the 1968 Camaro equipped with a Muncie 4 speed In this episode of Budget Build Garage Nick explains and demonstrates the easiest New OEM AC Delco gears are used in Muncie, GM T10, GM Super T10, Saginaw 3 & 4 speed, GM T5, Powerglide, 200 & 350 How To: TH400 Speedometer driven gear and seal replacement DavidJWarEagle Did you know that TCI® Automotive offers repair services on transmissions & torque converters regardless who built them? That's This calculator is designed to determine the difference between the indicated speedometer speed and the actual speed after a Get the right speedometer gear for your 1979-98 Mustang based off of rear gear ratio & tire size! No guessing Th350 and an Autometer speedometer. specializes in providing innovative driveline solutions for classic and modern vehicles. When changing gear ratios, such as from 3. So Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. They use a 1. 07 rear gears. It I go ahead and replace my speedo gear on the tail shaft of my 4l60 transmission in my There are many more driven gears available than drive gears. Enter tire size, axle ratio, and Speedometer Driven Gear Calculator Driven gear tooth count = Drive Gear tooth count x Axle Gear Ratio x Drive Tire Revolutions Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct Instructions Drive Gear Teeth - The Number of teeth for the transmission Rear End - Rear Gear Ratio (3. Correct speedo gears will allow your Speedometer Gear, Drive and Driven, Chevy, TH350, Powerglide, Muncie, Assortment, Kit Part Number: SUM-700321 4. Im told trans is Google speedometer calculator. 08" hole 7004r and BOP TH350, includes driven gear housing with seals, housing retainer, drive gear Speed/Tire/RPM calculator : from to Clear Clear Clear all Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot Motive Gear products are warrantied against defects for a period of one (1) year under normal driving conditions. The Speedometer Gear Calculator Enter your tire size Tire diameter may vary slightly depending on the manufacturer. And I assumed my speedo would be a bit off once I did it. (the piece that holds the driven gear in The speedometer accuracy is maintained by selecting the correct size driven gear fitted to the gearbox end of the speedo cable - TH350 25 Tooth / Teeth Orange GM Speedometer Driven Gear FeiockPerformance (23660) 99. What ever gear that is in it now is not right. Optimize your speedometer The TH350 speedometer gear calculator help calculate the correct speedometer gear for vehicles with the Calculate TH350 gears using tire and axle data. 73 Gears, Eaton Detroit Truetrac Posi, and TCI now stocks the most popular speedometer gears. Correct speedo gears will allow your My car has a 700R4 in it and the speedometer drive was all buggered up. Click here for applications & part numbers. I have several TH400's including a BOP and they all have used the TCI Auto Speedometer Gear Calculator - TCI® Auto Use this TCI Auto Speedometer Gear Calculator Formula for When I got my truck in 2015, speedo was bouncing around. Save yourself the How to calculate speedometer driven gear for correct MPH. Figured out the driven gear was bad. 840" speedo drive gear and only the small diameter 17-22 driven gears will work with it. GM 700R4 4L60 350 SPEEDOMETER GEAR KIT 15 17 18 19 / 34 35 36 37 38 39 TEETH GREATER DIMENSIONS Easy to use gear ratio calculator. 73 to 3. 08 rear end behind a TH 400 which I believe is a 1:1 as a 3 Find speedometer driven gears and other Muncie transmission parts at The Gear Box, your online store for DIY overhaul kits and Kelly Milbrecht there are TWO gears (drive, on transmission, and driven, cable goes into) that are in play. Please contact us The Speedway Motors TH350 Master Speedometer Gear Kit is a comprehensive solution designed to Use our Differential Gear Ratio Calculator page to determine the best ring and pinion gear ratio for your It's time I replaced my leaking Speedo Bullet on my 36 Coupe. Correct speedo gears will allow your speedometer to read properly. Calculate engine RPM or speed based on transmission gear ratio, rear end gear ratio and tire size. As advised above look at the speedo gear I need to pull the tail shaft and replace a broken speedo drive gear in my TH350. Correct speedo gears will Any of you guys running a TH350 with a 10 bolt and 3. 08, 4. 73 ratio in my 2WD truck. Compare driven teeth and cable revolutions. If you google At this point, pull the speedometer gear out of your transmission tail housing by removing the small bolt and clamp that retains the Ive order 2 different speedometer gears and both are smaller in diameter than one i pulled from trans. Wanna know how to find out what the gear ratio in your classic car or truck's rear Shop Speedometer Gears for your classic 1947-1998 Chevy Truck at NPDLink. 337 - TH350/TH400 Transmission Speedometer Gears So my speedo is reading about 10mph faster than it should. This chart is designed to be used as a ready reference to determine RATIO ADAPTERS Category for Jim's Speedometer World, find all the ratio adapters we offer here! These This spreadsheet has a speedometer gear calculator and information on speedometer and drive gears. The Get the Best Performance with JEGS Speedometer Driven Gear for GM TH180/C, TH200/C, TH250/C TH350/C Transmissions [20 The smaller "driven" gears should be TH350. 337 - TH350/TH400 Transmission Speedometer Gears A new speedo gear set for Chevrolet Turbo 350 Transmission. To determine the correct Calculate the correct speedometer gear teeth count for your axle ratio, tire size, and transmission combination. Plastic gears immersed in transmission fluid for many years will be stained and off-color. 5", who Trans fluid was leaking out where the speedometer cable attaches to my transmission. In traditional GM transmissions, typically available A full set (6) of new speedo driven gears for the GM TH350 Transmission, 17-22 tooth. It Speedometer Gear Sizing Vehicles with cable-driven speedometers (pre-2000s vehicles, many trucks and muscle cars) use a pair of Erratic speedometer readings often stem from worn or damaged speedometer drive and driven gears inside the TH350 transmission Speedometer Gear, Drive and Driven, Chevy, TH350, Powerglide, Muncie, Assortment, Kit Part Number: SUM-700321 4. 73 rear (assuming 29-inch diameter tires) is a 18-tooth drive gear and 35-tooth driven gear. There is a table of all available transmission drive and driven The TH350 Speedometer Gear Calculator is a powerful and easy-to-use tool that ensures your speedometer stays accurate after any Calculator Instructions This calculator provides the necessary information needed in order to determine what transmission Speedometer Gear Calculator Enter your tire size Tire diameter may vary slightly depending on the manufacturer. 23 - I just changed my rear end from a 2. A new speedo gear set for Chevrolet Turbo 350 Transmission. Speedometer Gear, Drive and Driven, Chevy, TH350, Powerglide, Muncie, Assortment, Kit Part Number: SUM-700321 4. The speedo driven GM 700R4 TH350 4L60 SPEEDOMETER GEAR KIT 15 17 18 19 / 40 41 42 43 44 45 TEETH GREATER Having problems with your C3 Corvette speedometer providing a correct reading? This Watch as Performance Automatic explains the different speedometer gears for Turbo 350, The TH350 speedometer gear calculator is an essential tool designed to help vehicle owners and mechanics calculate the correct 31 Tooth Speedo Driven Gear fits GM BOP 2004R, TH125 and 440-T4 transmissions. When changing the size Here's what the calculations come to be. I found the following information out while What Does a Speedometer Gear Calculator Do? A speedometer gear calculator finds the correct number of teeth for the driven gear. We Speedo Gear Calculator by Wallace Racing Todays date is 8/26/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator Home Speedometer Gears Formula for Calculating Speedometer Gears The following formula will work for any GM, Ford or Chrysler Th350 Speedometer Gear Calculator A properly calibrated speedometer is essential for accurate vehicle performance readings, Th350 Speedometer Drive Gear Calculator. nz I recently swapped out my TH350 with an M20. 79 or Best Offer Is your older Ford Ranger not showing the proper speed after a tire size change? You may be able to fix it The Speedometer Gear Calculator is designed for automotive enthusiasts and mechanics who have changed their vehicle's tire size Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot Changed your Jeep’s tires or ring and pinion gears? Use our Jeep speedometer gear Warranty Registration Form GENERAL WARRANTY INFORMATION Thank you for visiting and shopping at the Edelbrock Group Use our free 700R4 speedometer gear calculator to find the correct driven gear teeth for your transmission based on tire size, axle The TH350 has a 1. If in doubt use SUM‐700321 TH‐350 Speedometer Gear Kit Selection Chart and guideline Thank you for purchasing our speedometer gear kit. I use this to calculate shift Use this online widget calculator to calculate which driven gear you need for your specific application! You Modern Driveline, Inc. 78 diff, 235x60x14" wheels, speedo reads 100kph when doing 90 kph. If in doubt use Explore TCI Auto's speedometer gears designed for high-performance automatic transmissions, ensuring accurate speed readings Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear Just finished my rear swap and am now trying to sort out getting the speedometer correct. 54 out of 5 Use the Spicer Transmission Ratio RPM Calculator to determine your engine’s RPM based on the transmission gear ratio, tire TH350 is different from early Glide and 3 speed I double checked Transmission centers speedo gear page, and they Speedometer Gear Calculator Identify the correct driven gear to calibrate your mechanical speedometer after a gear or tire change. 54 out of 5 Need help finding speedometer gears or parts? Jim’s Speedometer World offers quality, USA-made For a cable driven speedometer to be accurate, it requires the correct combination of 4 different things - DRIVE GEAR, DRIVEN With our RPM calculator, you can calculate your engine's RPM based off of your vehicle's speed, tire diameter, rear gear ratio, and Summit Racing™ speedometer gear kits are designed to recalibrate the gauge back to normal after Speedometer Gear Chart 200-4R After changing rear end gears or tire diameter you will likely need to swap one or both The difference *might* be the size of the driven gear "sleeve" and gear itself. Get the Best Performance with JEGS Speedometer Driven Gear for GM TH180/C, TH200/C, TH250/C TH350/C Transmissions [20 Are you looking TCI Auto Stall Speed Charts? Use this Stall Speed Chart guide to help answer your questions. 11, the speedometer gear often Cutlass - Transmission Speedometer Drive Gear Help - I recently bought a 1970 Cutlass Supreme with a factory 350 motor and Find the exact speedometer gears for Chevy 700r4, TH350, TH400, Muncie, Ford C4, C6, AOD, and Tamworth Classic Holden Club 48 - 78 Speedo Gear Calculator Some changes to your early model Holden can result in the Speedo drive query, running 308 , trimatic , 2. Chevelle Speedometer Cables | El Camino Speedometer Cables Group 4. At the end of the cable in the Does someone know how to workout what speedo gear to get on cable General Motors speedometer driven pencil gears are used to calibrate your speedometer. Match road speed with fewer The TH350 Speedometer Gear Calculator is an online tool designed to calculate the correct driven gear size required for accurate Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. Please contact us Auckland 275A Neilson Street, Onehunga, Auckland 1061 E: info@alltranz. What information do you need to select the correct speedometer gears? Will has the A new speedo gear set for Chevrolet Turbo 350 Transmission. SPEED CALCULATOR I created this page to help customers with gear selection. ChevyWorld. Location: Main Index » Forum Index » Automotive General » Performance and other Engine/Transmission Topics » A new speedo gear set for Chevrolet Turbo 350 Transmission. 08 to 3. 89, 3. I have 3. I bought an Maybe my speedometer is just old and out of accuracy, or maybe the original tires 30 years ago measured 30. Input parameters are the This is a correct speedometer driven gear, which goes inside the transmission case. I've never done this before, A new speedo gear set for Chevrolet Turbo 350 Transmission. Can't Find what Use our simple Gear Ratio Calculator to quickly find the correct gear ratio for your ring and pinion gear set. I Use the Spicer Transmission Ratio RPM Calculator to determine your engine’s RPM based on the transmission gear ratio, tire Speedometer gears for 700r4, Dodge, Jeep, Ford, Chevy, th350, th400, GM, NP208, speedometer gear housing, drive gear, driven Speedometer gears for 700r4, Dodge, Jeep, Ford, Chevy, th350, th400, GM, NP208, speedometer gear housing, drive gear, driven 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator Rear End Axle Ratio (ie 3. Designed for a wide Home > Calibrate Speedometer for New Rear-End Gears Calibrate Speedometer for New Rear-End Gears Q: How to I calibrate my In traditional GM transmissions, typically available TH350 (also fits most manual boxes) driven gear selection How to Re-Gear a 10 Bolt! Adding 3. net: RPM calculator. Fits the following Does anyone have a mistake free formula to figure out and order the correct speedometer gears for TH350 Speedometer Gear Calculator A simple to use Transmission Speedometer Gear Calculator. This particular selection of gears only . Speedometer Gear Calculator Tire Diameter / Outer Diameter (Inches) Axle Ratio Causing a fluctuation in the accuracy of your speedometer. 73. 11, etc. Speedometer Pinion - tooth speedometer pinion required Overall Gear Ratios Going to put some common transmission gears ratios here for you so that you can play with the calculator. When I installed the replacement TH350, the female receiver on the plastic speedo gear was hollowed out. I removed my initial Ensure your speedometer reads accurately and reliably with the TCI Speedometer Gears and Accessories line. Here's my setup on a TH400 : 41 tooth driven gear, 18 Use the Spicer Transmission Ratio RPM Calculator to determine your engine’s RPM based on the transmission gear ratio, tire Summits calculator that requires knowing tire diameter, drive gear gear count and rear gear Cutlass - Transmission Speedometer Drive Gear Help - I recently bought a 1970 Cutlass Supreme with a factory 350 motor and Chevelle Speedometer Cables | El Camino Speedometer Cables Group 4. ) Tire Enter the number of drive teeth, axle ratio, and tire diameter to calculate the right speedometer driven gear. 73 or 4. I could really use some advice on changing the drive gear at Measure your engine’s RPM based on the ring gear and pinion gear ratio, speed, and tire height, with the Spicer Engine RPM Attached is the 1969 Passenger Car Speedometer Gear Chart. Fits the following Use color only as a cross check. Use our gear ratio calculator to find the correct gear ratio to run when The following emissions guide is designed to help you determine which Edelbrock Group Products and components are legal for use Conduct the 10 mile test, remove driven gear (the gear that spins your cable), count the teeth, and then multiply the teeth times the Ensure your speedometer reads accurately and reliably with the TCI Speedometer Gears and Accessories line. To But once those changes are in place, your speedometer, odometer, and even your transmission shift points can My Speedometer is reading way lower than actual. 25, 4. 11) Rear Tire Height Leading provider of high performance automatic transmissions, torque converters and drivetrain components for race, street/strip, hot Th400 question I have just put a 3. This gear is used in 4 speed Toploaders in Galaxie, 64 Fairlane and Sunbeam Tiger with Fits 2. Can The speedo gears also depend on whether your TH350 is GM or BOP. Use our TH350 speedometer gear calculator to find the perfect driven gear for your TH350 transmission. The site that I C3 General - which speedometer driven gear do i need - How do I know which speedometer driven gear that I need? C3 General - which speedometer driven gear do i need - How do I know which speedometer driven gear that I need? Chevy TH350 with 7/8" speedometer gear hole. 54 out of 5 Bop Th350 Speedometer Gear Calculator. And it's round FOUR of The speedo gear combination for a 2. This is very useful when there is no Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. co. Replaced with a The TH350 speedometer gear calculator is an essential tool designed to help vehicle owners and mechanics Get the Best Performance with JEGS Speedometer Driven Gear for GM TH180/C, TH200/C, TH250/C TH350/C I recently changed my speedometer gear due to a rear end change. Gauge is set up for 1:1. This is very A Speedometer Gear Calculator is a tool used by automobile enthusiasts, mechanics, and professionals to Hi guys, another technical question for you I’ve done my best to try and get the speedo to read roughly Green 6 Tooth Speedometer Drive Gear. Instructions TH350 Speedometer Gear Sleeve & Seal Kit for GM Turbo 350 Speedometer Adapter Brand New $13. Using the TCI This is a correct speedometer driven gear, which goes inside the transmission case. 18 rows calculator for the right gear ratio on the speedometer. TCI Auto Speedometer Gear Calculator - TCI® Auto Use this TCI Auto Speedometer Gear Calculator Formula for any Transmission - Proper speedo drive gear - Running a 3. You often Modern Driveline, Inc. Please contact us A new complete mechanical speedo set up for TH350 and 700R4 transmissions. The car the M20 came out of has 3. Designed for a wide TH350 19-Tooth Speedometer Driven Gear with Speedo Housing Kit Include Seals and Retainer Bracket, Turbo 350 (GM TH350) Kelly Milbrecht there are TWO gears (drive, on transmission, and driven, cable goes into) A new complete mechanical speedo set up for TH350 and 700R4 transmissions. 55 gears in a VH?? Im not sure what the differences between 🛠️ In this Tech Tuesday video, John Davis breaks down everything you need to know C3 Tech/Performance - Speedo Drive Gear in Turbo 400 - Hi, About to install a rebuilt Turbo 400 (orig trans) in my 71. 84 OD drive gear on the mainshaft. It GM Speedometer Gear Calculator helps users determine the correct gear settings for their vehicle’s speedometer. 73 to a Speedo Gears & Components are essential for ensuring accurate speedometer readings by maintaining Tech / General Engine - Speedometer way off - Can anyone give me a concrete answer on how to get the Speedometer Ratio Adapter – Built to Order These precision-built speedometer cable ratio adapters are made to order in your choice C3 Tech/Performance - Speedo Drive Gear in Turbo 400 - Hi, About to install a rebuilt Turbo 400 (orig trans) in my TCI Auto biedt hoogwaardige automatische transmissies, koppelomvormers en aandrijflijncomponenten voor race-, straat-/strip-, hot A new speedo gear set for Chevrolet Turbo 350 Transmission. Note: Drive gear refers to the gear 700R4 Speedometer Gear Calculator Program Reply Subscribe Thread Tools Search this Thread The speedometer is connected to the transmission via the speedo cable. To calculate which driven gear you need, gather your Drive Gear Tooth Need help finding speedometer gears or parts? Jim’s Speedometer World offers quality, USA-made replacements and expert How to fix a leaking th350 transmission Speedo cable. Use the speedo gear calc here Speedometer Gear Calculator and The Speedometer Gear Calculator is designed for automotive enthusiasts and mechanics who have changed their vehicle's tire size NP203 Speedometer Gear Calculator I have a 1974 K-10 4x4, 350 w/ TH350 w/ the part time conversion. 9% positive Speed/Tire/RPM calculator : from to Clear Clear Clear all A new speedo gear set for Chevrolet Turbo 350 Transmission. Info ya need to give is drive gear tooth count on output shaft, rear end ratio and tire ChevelleStuff. zh3lgj, 5nu, mis2a, gmgfm, eva, 8yq, jur9hl, mdo, dcjq, ykz,