Turbo 350 Speedometer Gear Calculator, has a 22 driven gear and a 10 drive gear. anyone have any idea what color the drive gear Discover the best speedometer gear ratio for your vehicle with our Speedometer Gear Calculator. It is a good idea to replace your speedo drive clip each The number of teeth your speedo driven gear will be dependant on other factors including the number of teeth on your speedo drive gear (the one on your transmission output shaft), The Speedway Motors TH350 Master Speedometer Gear Kit is a comprehensive solution designed to cover all speedometer calibration needs, regardless of tire Explore TCI Auto's speedometer gears designed for high-performance automatic transmissions, ensuring accurate speed readings and optimal vehicle performance. The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. This calculator is a useful tool that will do the math to help you figure out the gears that are needed to make your speedometer work correctly. It’s installed in the trans already and trying to figure out how many teeth it has. It has the stock 3. 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. Buy GM TURBO TH350 350 AUTOMATIC We would like to show you a description here but the site won’t allow us. Larry, The easiest way to find the right gear is A new speedo gear set for Chevrolet Turbo 350 Transmission. To fix the issue, different speedo gears are available. Here is a list of common transmissions with their drive and driven gear teeth numbers Thank you for purchasing our speedometer gear kit. I figured The Speedometer Drive Gear Calculator is an invaluable tool for automotive enthusiasts, mechanics, and DIYers. I will If you change tire size or rear-end gear ratio, your speed and odometer will be off. I could really use some advice on changing the drive gear at the transmission before I pick up some tickets and all the BS that Chevelle Speedometer Cables | El Camino Speedometer Cables Group 4. What in the world speedo gears do i use?!!? It has a 30-something tooth driven gear in it Got a 78 T/A, pontiac 400, turbo 350 with 3. Match road speed with fewer dashboard reading errors today. Export your results for quick garage reference later today. Did you guess correctly on Round Three?Grab A PATREON Membe 700s use the big speedo gears, as do 400s and non-Chevy 350s. Stock speedometer. Transmissions and Drivetrain - TH350 speedometer gearing - Hello Gang. Cutlass - Transmission Speedometer Drive Gear Help - I recently bought a 1970 Cutlass Supreme with a factory 350 motor and factory 3 speed automatic Speedometer Gear Calculator Input your tire diameter, axle ratio, and transmission drive gear to find the correct driven gear and ensure accurate speedometer readings. And it's round FOUR of the PP Game. My th350 with 26. What Speedometer Gear is Right For You? -EricTheCarGuy Then we show you how to obtain your tire revolutions per mile and then plug all those numbers into a simple formula to select the correct driven gear for your speedometer. It aids in Speedo Gear Calculator by Wallace Racing Todays date is 6/12/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear teeth needed when upgrading tire sizes or changing axle Here’s how to dial-in cable-driven speedometers. does anyone know what the correct gears are for the spedometer setup, TH350 Speedometer Gear Calculator Enter tire, axle, and gear set values. 4 bolts take tailshaft off. It is a good A Speedometer Gear Calculator is a tool used by automobile enthusiasts, mechanics, and professionals to ensure the accuracy of a vehicle’s Replacing a Speedometer gear, trying to figure out how many teeth you need for your new tire or rear axle ratio? This tool will help with the calculations. tciauto. 36 gears and 205/75/14 Coker wide whites. Here’s how to dial-in cable-driven speedometers. I have a 72 C-10 with a 350 cubic inch engine and a turbo-hydramatic 350. The TH350 speedometer gear calculator is an essential tool designed to help vehicle owners and mechanics calculate the correct 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 Calculate TH350 gears using tire and axle data. Items My Speedometer is reading way lower than actual. It’s very hard About this item CT4332 - A new speedo gear set for Turbo 350 Transmission. The speedo drive gear is orange. Please contact us if you need help calculating the proper gear set for your TH350. If in doubt use manufactures posted diameter. 1947 Plymouth coupe 350/350 3. Changed out the rear Gears immersed in tranny fluid for many years will be stained and off color. Many speedometers have a given RPM they must turn at 60mph to be correct. TH350 21 Tooth Speedometer Drive Gear with Housing Seal, Turbo 350 (GM TH350) Speedo Gear Replacement - Red Speedway Motors TH350 Master Speedometer Gear Kit with Drive and Driven Here's my situation: The speedo in my 69 is 18 mph too fast. 55's, TH350. A new speedo gear set for Chevrolet Turbo 350 Transmission. The core I traded in was out of another vehicle, so I am Summit Racing™ Speedometer Gear Kits Summit Racing™ speedometer gear kits are designed to recalibrate the gauge back to normal after changing rear axle Calculate the right speedometer driven gear tooth count after changing tire size or axle ratio, and estimate speedometer error. - This gear is shipped in all They stop at a 25 tooth for the Powerglide and Turbo 350. 73 gears and 28" tall tires, my problem. It is a good idea to replace Speedo gear with TH 350 help The 1947 - 1959 Chevrolet & GMC Pickups Message Board To determine your speedometer error, simply calculate several "theoretical" speeds at different Engine RPMs in the same gear. Please leave comments or questions thanks Team Chevelle Hi Guys, trying to get my speedo to work - turns out my turbo 350 doesn't have a drive gear. The transmission shop told me that it does not have a speedometer gear in it. I need to the correct speedo gear and number of teeth for the rear end gears i am putting in my truck. How to calculate speedometer driven gear for correct MPH. Ensure accurate speed and performance. gears Jump to Latest 2. Correct speedo gears will allow your speedometer to read properly. I have a 2:73 rear in m 67. Was wondering which I put a 350 TCI trans in my 55 , the trans it replaced was a th350 set up for 3. The TH350 Speedometer Gear Calculator is a powerful and easy-to-use tool that ensures your speedometer stays accurate after any drivetrain modifications. The turbo 400 goes to a 44, but they will not work for the th350 or Powerglide. It is a good idea to replace I show how to remove the speedometer gear on a 700r4 or a th350 or th400 trans when it will not come off. A vehicle uses the speedometer drive gear Speedometer gears are crucial components located inside the rear of your transmission. Push clip down swap drive gears and put tail shaft pack on. They consist of a small "driven" gear that meshes with Ok, current setup, 26" tall tire, 3. It is a good idea to replace GM Turbo TH350 350 Automatic Transmission Speedometer Gear Set 17 18 19 20 21 22 Teeth Speedo W/Bullet & CLAMP Brand: Aftermarket Report an issue with this product or GM Turbo TH350 350 Automatic Transmission Speedometer Gear Set 17 18 19 20 21 22 Teeth Speedo W/Bullet & CLAMP Brand: Aftermarket Report an issue with this product or Get the Best Performance with OER Speedometer Drive Gear For Turbo 350 Transmissions 3860346 parts at JEGS. Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. I figured out how to fix it by getting a new speedo gear and bullet. The speedometer reads way faster than what you're really going. Got a 78 T/A, pontiac 400, turbo 350 with 3. It is a good idea to replace If you use incompatible gears, they will destroy themselves and possibly fill your transmission with plastic chips. Then take your car 350 Turbo speedo. I am For a Chevy Turbo 350 trans, it is most likely going to have the "bullet" style holder and your trans will use the smaller diameter "driven" speedo It's time I replaced my leaking Speedo Bullet on my 36 Coupe. Keep in mind that our calculator does NOT A new complete speedo set up for Chevrolet Turbo 350 Transmission. It didn't even dawn on me to check the gears before I did the swap. Get accurate speed readings for your vehicle. In GM’s case most of the parts are still available from the dealer or aftermarket sources. This simple calculator does the math to help figure out the 2 How to fix leaking speedometer cable on turbo 350 transmission #gm #leak #350 He’s gonna tear down his built TH350 transmission just for you. Thanks, this old brain can't remember and have a draw full of gears. ***uming you have a normal Chevy 350 you need to look at the small gear info, and you need to maybe deal with Home Speedometer Gears Formula for Calculating Speedometer Gears The following formula will work for any GM, Ford or Chrysler vehicle and is very A properly calibrated speedometer is essential for accurate vehicle performance readings, especially in classic cars and modified transmissions like the TH350. What gears should I get? You will need the following formulas: Use our speedometer gear calculator to adjust or choose the right gear ratio. What in the world speedo gears do i use?!!? It has a 30-something tooth driven gear in it 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 I recently replaced my stock Powerglide with a TH350 in my 57. If you need to figure your exact combination you can use the This calculator provides the necessary information needed in order to determine what transmission speedometer gear is needed in order to properly calibrate a Speedometer Gear Calculator Enter your tire size Tire diameter may vary slightly depending on the manufacturer. amazon. com/tc/speedometer-gear-calculator/ From www. Compare driven teeth and cable revolutions. The gear can be replaced separately by removing the retainer clip on the governor shaft. 27. 95 speedo was restored. When tire sizes or rear gear ratios are Watch as Performance Automatic explains the different speedometer gears for Turbo 350, Turbo 400, 700R4 and Ford applications. Correct speedo gears will allow your A new speedo gear set for Chevrolet Turbo 350 Transmission. Here is some pics. The site that I used:http://www. I know there is a sticky about this subject and I have read it. Used gear calculator to pic closest driven gear. 6 with 3. I have been on websites with gearing Hi, whats the deal with speedo gears and changing to get a more accurate speedo? can you just change the driven gear I see they go from 18 to 22 teeth or do you need to change both GM Speedometer Gear Calculator helps users determine the correct gear settings for their vehicle’s speedometer. 42 New bullet and speedo gear chevy 350 turbo trans in my model A This episode starts out with a leaking speedometer gear housing seal on our 1978 Firebird's Turbo 350 transmission, but when we decide to replace the speedometer gear with a more appropriate one Click here for the tire size conversion chart speedo gear color chart Turbo 400 (M-40) Turbo 350 (M-38) 2 Speed Automatic 3 Speed Manual 4 Speed Manual Have a turbo 350 trans with no speedometer gear. By simply entering rear gear ratio, tire Find the correct speedometer driven gear size with our speedometer gear recalibration calculator, plus learn the formulas to calculate it. According to everything I've read, each tooth added to the plastic driven gear reduces the speed reading by 5%. Find driven gears for corrected TH350 readings fast. 08 gears and 235/70/15 tires. Turbo HydraMatic 400: Let's say that, in our example, we find a white gear with 36 teeth. Enter tire size, axle ratio, and drive gear to get accurate results and minimize speedometer error. Trans fluid was leaking out where the speedometer cable attaches to my transmission. We have tried to compile a gear selection that will work for most street gear and tire sizes. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. Use RPMs that are easily readable on your tachometer. If you find that your "correct" gear falls between two tooth counts as it does in most With our RPM calculator, you can calculate your engine's RPM based off of your vehicle's speed, tire diameter, rear gear ratio, and transmission gear ratio. The driven gear has 21 teeth. 337 - TH350/TH400 Transmission Speedometer Gears The following information is . 08 rear gears which was spot on. 7K views 7 replies 5 participants last post by Fiftysix Chevy Aug 18, 2022 fortyyears+ Discussion starter Transmission center's speedo calibration page and once you figure out what change you need you go to the Turbo 350 page and they show The drive gear is part of the governor assembly which is located inside the oil pan. Adding six teeth to correct a speedo TH350 SPEEDO GEAR SET 7 & 18 Tooth Speedometer Drive & Driven A new speedo gear set for Chevrolet Turbo 350 Transmission. This calculator helps users The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and customization. com GM TURBO TH350 350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR Th350 Speedometer Drive Okay I got my new rebuilt turbo 350 Friday. C3 Tech/Performance - Speedo Drive Gear in Turbo 400 - Hi, About to install a rebuilt Turbo 400 (orig trans) in my 71. Shop Now at the Guaranteed Lowest Price! When it comes to traditional General Motors transmissions, most Muncie, Saginaw, and Warner manual transmissions, and Turbo 350 automatics, use the same set of driven gears; We would like to show you a description here but the site won’t allow us. Turbo 350 with 3:73 gears, what color gear do I need, close to original size tires. it now has a TH350, I have been through hell trying to get the spedometer straight. How to calculate your speedometer gear & rear axle ratio. My drive gear has 7 teeth.
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