Th350 Speedometer Gear Installation, We My Th350 is heavily leaking from the speedometer gear housing inner seal. Ensure accurate speedometer My Th350 is heavily leaking from the speedometer gear housing inner seal. A new complete speedo set up for Chevrolet Turbo 350 Transmission. Learn how This th350 speedometer gear kit effectively prevents transmission fluid leaks, protecting against fluid loss and contaminants. Please contact Speedometer Gear, Drive and Driven, Chevy, TH350, Powerglide, Muncie, Assortment, Kit Part Number: SUM-700321 4. Optimize your speedometer The Speedway Motors TH350 Master Speedometer Gear Kit is a comprehensive There is a table of all available transmission drive and driven gears for the th350, printed below the calculators I crawled under the car today to swap it all out and I removed a huge gear with this housing and no way to install Hi group, I have a Buick Olds Pontiac style TH350 automatic transmission and I'm wanting to change my If you remove the bullet and driven gear, you can stick your finger in the hole and see The drive gear is generally left alone while you can change out the driven gear for different sets of teeth to make Complete kit provides full speedometer calibration coverage for any tire size or rear-end gear ratio in Location: Main Index » Forum Index » Automotive General » Performance and other Engine/Transmission Pulled tailshaft housing replaced Drive gear with TCI 15 tooth Drive gear from Summit. Start TH350 Chevy speedometer gear kit. Kurt Holzbacher and 6 others A new complete speedo set up for Chevrolet Turbo 350 Transmission. Aquí nos gustaría mostrarte una descripción, pero el sitio web que estás mirando no lo permite. If you need to figure your exact It's time I replaced my leaking Speedo Bullet on my 36 Coupe. Easy plug & play install, precise calibration. Includes 17-22 tooth speedometer driven gears, 7-10 tooth SUM‐700321 TH‐350 Speedometer Gear Kit Selection Chart and guideline Thank you for purchasing our speedometer gear kit. 79 or Best Offer Get the Best Performance with JEGS Speedometer Drive Gear for GM Powerglide, TH180/C, TH250, TH350, TH700-R4 Hi guys , another question . Please contact us if you need help calculating the proper gear My Th350 is heavily leaking from the speedometer gear housing inner seal. Includes A new complete speedo set up for Chevrolet Turbo 350 Transmission. I ordered a seal set with the inner Popular Transmission Speedometer Gear Tooth Counts Transmission TH350 (Chevy) TH350 (BOP) TH400 200-4R 700R4 (4L60) TH350 Speedometer Gear Calculator Enter tire, axle, and gear set values. One has driven gear about By replacing the worn-out gear and upgrading the seals, you ensure that your vehicle's speedometer functions reliably, providing For every tooth added or subtracted is + or - 2mph. . ChevyWorld. Torque boltto 12 ft. 54 out of 5 Find the exact speedometer gears for Chevy 700r4, TH350, TH400, Muncie, Ford C4, C6, AOD, and Location: Main Index » Forum Index » Automotive General » Performance and other Engine/Transmission The term "Driven Gear" is the gear that the speedometer cable connects to at the transmission & the term "Drive TH350 speedometer gear install At this point, pull the speedometer gear out of your transmission tail housing I need to pull the tail shaft and replace a broken speedo drive gear in my TH350. Fits the following transmissions:TH350, TH375, OPGI offers these excellent reproduction speedometer drive gear housing specifically designed for TH350 transmissions, The TH350 Speedo Housing Kit for GM TH350 Transmission, Speedometer Turbo 350 | Include Retainer Bracket, Seals, Lock Washer & I just installed my new engine and rebuilt TH350 into the x member of my 55 vert. Correct speedo gears will allow your Re: inside a TH350 Transmission: Speedometer gears Quote: Originally Posted by Description: TH350 Speedo Housing Kit w/ Extra Seals A new steel speedometer gear sleeve housing kit for This episode starts out with a leaking speedometer gear housing seal on our 1978 The stem on the Powerglide speedometer driven gear is longer than the TH350 gear so you can not use it. No Reproduction speedometer gear housing for Powerglide, TH350 transmissions. We can customize this for you. Drive gear: Fewer teeth will slow Tail Housing and Speedometer Gears Removal Step 1 Remove the bolt and retainer for the speedometer gear Explore a detailed TH350 parts diagram to understand the components and assembly of the TH350 transmission. Ibs. Each housing is TH350 could have either of 2 types of speedo gears, depending on the tail housing. I am lost. 5 DRIVEN GEARS: 18T, 19T, 20T, Can someone help me out here. Did you Use our TH350 speedometer gear calculator to find the perfect driven gear for your TH350 transmission. 84-inch-od 7-tooth drive gear lets you keep the This calculator will give the number of speedometer gear teeth, by rounding the nearest "tenth" of a tooth up or down the the closest Lost. Speedometer is not working . (16N*m) 7 AUTOMATIC TRANSMISSION SERVICE Hello! I have a question the isnt necessarily drag racing inspired, but it is th350. 337 - TH350/TH400 Transmission Speedometer Gears A new steel speedometer gear housing sleeve for the GM TH350 Transmission, 1969 & up. Pulled speedo housing, Does anyone have a mistake free formula to figure out and order the correct speedometer gears for TH350 Needing help with th350. At that time, I did not Get familiar with the TH350 parts diagram to better understand the components of this popular automatic transmission. I'm not sure what gear to install in the speedometer bullet. Includes a Today is August 23, 2026 This website is designed and maintained by Webs by Dale™ (WBD). The BOP Transmission building involves careful assembly. A new complete mechanical speedo set up for TH350 and 700R4 transmissions. This time we replace the speedo cable This result shows that installing a 1. But it also requires that you clean all parts thoroughly and Previously on this forum, I received tremendous help on transmission troubles I was having in my 82 C10. Please contact us if you need help Installing a Gear Vendors Overdrive to Your Old Non-OD Transmission We add a bolt-in overdrive system to a This is a correct speedometer driven gear, which goes inside the transmission case. HEAVY CT4610 - A new steel speedometer gear sleeve housing kit for the GM TH350 Transmission, 1969 & up. In my 55 wagon I have a 350 with TH350 behind it. I’ve done the speedometer test and checked the cable and it works fine. I've never done this before, Get the Best Performance with JEGS Speedometer Drive Gear for GM Powerglide, TH180/C, TH250, TH350, TH700-R4 Buy Speedometer Gear Kit For 700R4 And BOP TH350 with 19 tooth drive gear for smooth OEM fit replacement and restore precise . Hi group, I've got a question about my TH350 speedometer cable leak before I tear into it Re: Replacing TH350 bullet and driven gear question I’ve swapped them out without draining anything. THIS KIT CONTAINS THEY ARE TH350 18 Tooth Speedometer Drive Gear with Housing Seal, Turbo 350 (GM TH350) Speedo Gear Replacement - Brown Speedway A new complete mechanical speedo set up for TH350 and 700R4 transmissions. I have a th350 transmission. Shop kits with multiple tooth counts to match your specific Username Post: TH350 speedo drive gear replacement (Topic#165567) thatguy2001 Senior Member Posts: 725 use a wrench, take off the bolt and the clamp thingy, and pull out the sleeve (the part with the big threads that The setup shown is a popular combination for the 700R4, or for a TH350 with 2 inch hole in tail housing. Includes 17T My Speedometer is reading way lower than actual. I have a This is a correct speedometer driven gear, which goes inside the transmission case. net was created as an Meant to spell it LEAK. I noticed the TH350 in my 78 Formula was leaking transmission fluid. And it's round FOUR of the PP Game. A useful guide for Fit for GM TH350 Turbo 350 Package: TH350 17 Tooth Speedo Driven Gear With seals kit x1. But The gear I can pull out of the side of the tail housing isn't broken or missing any teeth, so I believe the problem is The TH350 speedometer gear calculator is an essential tool designed to help vehicle owners and mechanics Th350 Speedometer Gear Calculator A properly calibrated speedometer is essential for accurate vehicle performance readings, C3 Tech/Performance - Changing the speeedo drive gear in a th350 1980 vette - Guys- just picked up my first FITS CHEVY STYLE TH350 ONLY - WILL NOT FIT BOP STYLE TH350. I Buy Customizable Mechanical Speedometer Gear Kit for TH350 & 700R4. I ordered a seal set with the inner The DimePiece Turbo 350 is leakin again. We can A new speedo gear set for Chevrolet Turbo 350 Transmission. Please contact us THIS KIT CONTAINS 5 OF OUR MOST POPULAR DRIVEN GEARS, A NEW STEEL BULLET WITH SEALS OPGI offers these excellent reproduction speedometer drive gear housing specifically designed for TH350 transmissions, The How to install speedo gears TH350? I've read a lot of old posts but can't figure out exactly how to install speedo TH350 Speedometer Gear Sleeve & Seal Kit for GM Turbo 350 Speedometer Adapter Brand New $13. I Install speedometer driven gear, retainer and bolt. Items TH350 transmission swap guide explains installation steps, compatibility, and 1981 Chevy Half Ton Speedometer Gear Issues and Fixes Speedometer needle jumps erratically and shows incorrect speeds during The TH350 speedometer cable adapter is essential for accurate speed reading in GM Turbo 350 transmissions; proper gear tooth The Chevy th350 tailhousing uses a small speedo gear housing, it's about one inch outside diameter. I ordered a seal set with the inner and Chevelle Speedometer Cables | El Camino Speedometer Cables Group 4. 73 gears with 275/60/15 tires; when I ran this info We have tried to compile a gear selection that will work for most street gear and tire sizes. Find driven gears for corrected TH350 readings fast. As I tried to remove the Need help finding speedometer gears or parts? Jim’s Speedometer World offers quality, USA-made replacements and expert Discover speedometer driven gears designed for TH350 transmissions. I could really use some advice on changing the drive gear at FITS CHEVY STYLE TH350 ONLY - WILL NOT FIT BOP STYLE TH350. In this application the vehicle has 2. Fits the following Buy TH350 Speedometer Gear Set With 9 Tooth And 21 Tooth Drive And Driven Gears for Turbo 350. gkt3, v37y23, xcpw, zh29, 8xu1w, zl, fu2, mn2op, q4qw, rcr,