Th350 Speedometer Gear Chart, This calculator will give TCI Speedometer Gear Calculator Navigation of the Speedometer Gear Calculator page is easy! Simply click on the desired calculator to populate the requested information and hit enter. I 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 A full set (6) of new speedo driven gears for the TH350 and 700R4 Transmissions, 34-39 tooth. My question is on the right gear combo. My The TH350 offered a substantial improvement to its predecessor, with the additional gear being an obvious improvement from the beginning. Built‑in P‑metric converter. Includes 17-22 tooth speedometer driven gears, 7-10 tooth speedometer drive gears, 5/16" driven gear retainer clip, 7/8" 7004r and TH350 BOP speedometer gear parts for 2" speedometer gear hole. The speedo driven gear is easy to change out, so it is always nice to have some options Transmissions and Drivetrain - I need help with speedometer gears - I finally found the driven gear housing I need for my TH350. Transmissions and Drivetrain - TH350 speedometer gearing - Hello Gang. To determine the correct gear ratio of the speedometer for your car, use the following formula to calculate the number of teeth on the driven The Speedway Motors TH350 Master Speedometer Gear Kit is a comprehensive solution designed to cover all speedometer calibration needs, regardless of tire Th350 Speedometer Gear Color Chart Wholesale visuellesbegreifen. any thoughts?thanks TOM TOCASE GaSKETOTP LOCATION = PUMP ASSEMBLY - GEARS DAMAGED. Get the Best Performance with JEGS Speedometer Drive Gear for GM Powerglide, TH180/C, TH250, TH350, TH700-R4 Transmissions [9-Teeth, Blue] 62090 parts at JEGS. 1/8th with Haluaisimme näyttää tässä kuvauksen, mutta avaamasi sivusto ei anna tehdä niin. Calculator for the right gear ratio on the speedometer. Please contact us prior to purchase if you would like us to substitute a A new speedo gear set for Chevrolet Turbo 350 Transmission. CRESCENT INTERFERENCE. There is speedo gear kits that come This CT1880 speedometer gear set is exactly what you need to get your speedo reading correctly again! The kit includes both the 10-tooth drive gear and 20-tooth driven gear, plus a new retainer clip (which It’s going to depend on rear end gear ratio and tire size. 1941 chevy big block with TH350 ,a 12 bolt rear from a 1967 chevy c10. 73 - - 18 3. Im told trans is th400. However, I don't trust the internet charts. Speedometer gears for BOP TH350 and 700r4 with 2" speedometer gear hole. I found the following information out while deciding what speedometer gear I needed. Learn how this popular automatic transmission operates and troubleshoot any issues. The Turbo Hydramatic 350, or simply Turbo 350, is a three speed automatic transmission used between 1969 and 1986 in a variety of GM cars, Explore a detailed TH350 parts diagram to understand the components and assembly of the TH350 transmission. 55 RATIO (3860346) TPD PRO Speedometer gearing charts While typing these pages, I realized there are literally thousands of combinations of speedometer gears. If I had a large drive gear and Discussion about installing a 3. Buy GM TURBO TH350 350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR SET 18 19 20 21 22 TEETH SPEEDO W/BULLET & Speedometer Pinion - tooth speedometer pinion required Overall Gear Ratios This is my first TH350 and the speedometer reads way high, like 60 at 45 per Garmin. The speedo driven gear is easy to change out, so it is always nice to How do I know which speedometer driven gear that I need? Before I started my restore, the speedometer was slow by about 10 mph at 60 mph. 73 RP and 275-40-17s in the C3 Tech/Performance - 1981 th350 speedo gears - My 81 was originally a 4 speed and the previous owner converted it to an automatic. build Th350 Speedometer Drive Gear Calculator * speedometer revolutions/mile = 1001. And it's round FOUR of the PP Game. Correct speedo gears will allow your speedometer to read properly. 5 posi with 3. Many speedometers have a given Due to unforeseen circumstances, we are temporarily unable to accept new online orders. It is a good idea to replace your speedo drive clip each Hi guys , another question . 41 -> 3. In my 55 wagon I have a 350 with TH350 behind it. The speedo driven gear is easy to change out, so it is always nice to have some options available to keep your 350 TH350, POWERGLIDE, MUNCIE, SAGINAW TRANSMISSION SPEEDOMETER DRIVEN GEAR BLACK 23T 3. The series you have to use will be determined by the diameter of the driven gear fitting or sleeve. Get Speedometer Gears fast! Low Prices, Fast Shipping, Easy Returns, US Based Support, Trusted Brands at Summit Racing. Ive order 2 different speedometer gears and both are smaller in diameter than one i pulled from trans. TH350_GD - Free download as PDF File (. 41s/1200 stall. 54's. 00-1 ratio nine inch into a Holden HZ with a turbo 350 transmission and finding the correct speedo drive cogs for accurate speedometer reading Discussion about installing a 3. 5 DRIVEN GEARS: 18T, 19T, 20T, 21T, 22T. How to fix a speedometer cable leak 200r4 gm transmission. 337 Gear, Transmission Speedometer Drive Gears (only) > page 2 * 1968 CHEVY, CHEVELLE, CAMARO SPEEDOMETER GEAR CHART (TH400 - 396) * 1969 CHEVY, CHEVELLE, Speedometer Gear Calculator Enter your tire size Tire diameter may vary slightly depending on the manufacturer. Almost all sites point to an How to calculate speedometer driven gear for correct MPH. Free Shipping - Summit Racing™ Speedometer Gear Kits with qualifying orders of $125. 55 posi that came stock in a chevelle or camaro. With those 3 things, it is easy to figure out which DRIVEN gear you need. DRIVE GEAR CLIP. Please contact us prior to purchase if you would like us to substitute a different driven or General Motors TH350 transmission specs, ratios, and tech. Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. 73 18 21 23 4. I'm changing my gears from 2. Discover speedometer driven gears designed for TH350 transmissions. These “Speedo TH350 Chevy speedometer gear kit. SEAL RINGS DAMAGED OR WORN. 99K subscribers 317 GM TURBO TH350 350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR SET 18 19 20 21 22 TEETH SPEEDO W/BULLET DRIVE GEARS and DRIVEN GEARS come in different colors which are supposed to indicate how many teeth the gear has. 73 gears with 275/60/15 tires; when I ran this info through the speedometer calibration it suggested using a 10 tooth drive gear and a 20 tooth Driven gear. Will need to swap the speedo driven gear. Optimize your speedometer accuracy based on tire size and axle ratio. Calculate the tooth count of the driven gear for different transmissions and speedometers. Find top brands, exclusive offers, and unbeatable prices on eBay. I have a '69 Camaro, TH350, 3. SUM‐700321 TH‐350 Speedometer Gear Kit Selection Chart and guideline Thank you for purchasing our speedometer gear kit. I have a Bind-Up on 2-3 Shift A bind-up on the 2-3 shift may be caused by a 250-C plate installed on a 350-C. I've currently got a '72 TH350 from a 1/2ton truck in my '67. Shop kits with multiple tooth counts to match your specific needs. Then count the Use our TH350 speedometer gear calculator to find the perfect driven gear for your TH350 transmission. Replacing the TH350 transmission speedometer seal and gear out on a 1978 Pontiac Trans Am. I've never done this before, anything to watch out for? Anybody know what gear I need for a 3. This is the correct method for counting Does anyone know off-hand the stock speedometer gears for a th350 with a 3. 73s gear with 255/50/16'' A new complete speedo set up for Chevrolet Turbo 350 Transmission. com FREE DELIVERY possible on I browsed through a few pages and didn't find a post about this. pdf), Text File (. We have tried to compile a gear selection that will work for most street The TH350 speedometer gear calculator help calculate the correct speedometer gear for vehicles with the TH350 transmission. 30 21 23 25 4. 07's for 3. Item description from the seller • Original New Old Stock General Motors NOS GM 1969 Chevrolet Passenger, Corvette, Chevelle, Camaro, Truck? (with Turbo Hydramatic 350) At this point, pull the speedometer gear out of your transmission tail housing by removing the small bolt and clamp that retains the speedometer gear sleeve and pulling on the speedometer cable. Once you have entered those fields in click Submit. 36 gears and a 25. 4 DRIVE GEARS: 7T, 8T, 9T, 10T. 73 posi rear, with 26" dia tires. for trans to get it to read close to right here is the combo i Speedo Gear Chart Axle Ratio 6T 7T 8T -Drive Gears 2. 42s. from my understanding the th350 driven gear will work 19 Pcs Speedometer Driven Gear & 345215 Seal Kit for TH350 Transmission | 17-22 Teeth Driven Gears, for GM T10, Super T10, Saginaw 3/4 Speed, GM T5, 200/350 Transmissions, Powerglide You 1947-77 Steel Speedometer Gear Housing (7/8" Diameter) - Powerglide/TH350 Trans - 18 to 23 Teeth Reproduction speedometer gear housings for Powerglide, TH350 & TH400 transmissions. Chevy Forums FREE technical assistance for your restoration and repair. Does Consistent 10. It is a good idea to replace your speedo drive clip each time the gear Any of you guys running a TH350 with a 10 bolt and 3. It is a good idea to replace For every tooth added or subtracted is + or - 2mph. I ordered a gear for th350 and th400, both being It's time I replaced my leaking Speedo Bullet on my 36 Coupe. 55 gear. co. There is speedo gear kits that come This CT1880 speedometer gear set is exactly what you need to get your speedo reading correctly again! The kit includes both the 10-tooth drive gear and 20-tooth driven gear, plus a new retainer clip (which Explore high-performance speedometer drives and gears for automatic transmissions, imported and distributed by Rocket Industries in Australia. A TH350 does not have a eccentric, re-position-able speedometer drive, that can accommodate a huge range of driven gear diameters like other The TH350 offered a substantial improvement to its predecessor, with the additional gear being an obvious improvement from the beginning. inside a TH350 Transmission: Speedometer gears The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board CT2212 - A full set (6) of new speedo driven gears for the TH350 and 700R4 Transmissions, 40-45 tooth. The speedo driven gear is easy to change out, so it is always nice to have some options available to keep A new speedo gear set for Chevrolet Turbo 350 Transmission. Please contact us prior to purchase if you would like us to substitute a different driven or Speedometer Gear Calculator Explanation This simple calculator does the math to help figure out the 2 gears that are needed to make your speedometer work correctly. txt) or read online for free. 55 gears in a VH?? Im not sure what the differences between the vb vc and vk dashes are so maybe they are the same as the VH If A new complete mechanical speedo set up for TH350 and 700R4 transmissions. A new speedo gear set for Chevrolet Turbo 350 Transmission. 55 17 20 22 3. 42 gear change, and I'm running into a A new speedo gear set for Chevrolet Turbo 350 Transmission. The site that I used:http://www. If I had a large drive gear and Tamworth Classic Holden Club 48 - 78 Speedo Gear Calculator Some changes to your early model Holden can result in the speedometer reading being inaccurate C3 Tech/Performance - Usual speedo drive gear TH350? - Sent my rear end from my '80 L82 to Bairs today for a rebuild. The speedo quit working and I've traced it back to the tranny I show how to remove the speedometer gear on a 700r4 or a th350 or th400 trans when it will not come off. Please leave comments or questions thanks use a wrench, take off the bolt and the clamp thingy, and pull out the sleeve (the part with the big threads that the speedo cable threads onto). Now the speedo is reading around 10 mph lower than I'm going. . Please contact us if you need help calculating the proper gear set for your TH350. Match road speed with fewer dashboard reading errors today. 08 - 18 20 3. 10 19 22 24 4. tciauto. It is a good idea to replace your speedo drive clip each time the gear I searched and read several threads from the past, on replacing the speedo gears when the ring gear has been changed. Explore the GM TH350 automatic transmission — its specifications, adaptability to Jeep transfer cases, and compatibility with various engines. Anyone know what I need to do to get my speedo The stem on the Powerglide speedometer driven gear is longer than the TH350 gear so you can not use it. Shop TH350, Speedometer Drive Gears and get Free Shipping on orders over $199 at Speedway Motors, the Racing and Rodding Specialists. It is a good idea to replace your speedo drive clip each time the gear I recently changed my speedometer gear due to a rear end change. 4%/5% = 3. Even the tooth count for TCI Speedometer Gear Housing GM Powerglide, TH350 Part Number: 890-880021 Product Q&A View Now Click image to zoom Buy GM TURBO 350 TH350 AUTOMATIC TRANSMISSION SPEEDOMETER GEAR SET 18 19 20 21 22 TEETH: Speedometers - Amazon. 5-26" tall tire should have? Some sort of chart or link to a reference would be COOL> TH350 speedometer gear install At this point, pull the speedometer gear out of your transmission tail housing by removing the small bolt and clamp that retains the speedometer gear Driven Gear Tooth Calculator Enter your drive gear teeth, axle ratio, and tire diameter (from above or manual) to calculate the correct driven gear. The car needing the speedometer gear has a T350, 3. How To: TH400 Speedometer driven gear and seal replacement DavidJWarEagle 3. It includes a chart detailing I'm working on fixing my speedometer. Erratic speedometer readings I need assistance here in determining where to get a speedometer gear from for one of my Camaros. Speedo Gears TH250 TH350 TH400 TH700 Trimatic C4 C6 BTR Share this Post: ⇐ Performance Parts for Aluminium Case Powerglide New Product Release, Week 11 / 2021 ⇒ Calculate the correct speedometer driven gear based on tire size, axle ratio, and drive gear. If in doubt use manufactures posted diameter. Please contact us if you need help calculating the proper gear set Hot Rods Th350 speedo gear Discussion in ' The Hokey Ass Message Board ' started by skinny pedal, Jan 4, 2017. The speedometer is running 10 Speedo Gear Calculator by Wallace Racing Todays date is 8/3/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers Free Shipping - Summit Racing™ Speedometer Gear Kits with qualifying orders of $125. What speedo gears should I buy? Speedometer Gear Selection Older vehicles use mechanical speedometers. nz Product Description The Speedway Motors TH350 Master Speedometer Gear Kit is a comprehensive solution designed to cover all speedometer accuracy adjustment needs, regardless About this item CT4332 - A new speedo gear set for Turbo 350 Transmission. During its time of usage, the TH350 was used in virtually TH350 Speedo Gear Advice needed Discussion in ' The Hokey Ass Message Board ' started by eldojoe, Apr 30, 2012. I believe about two less teeth on your driven gear (the one you can change easily from the side of the tail housing) Now with TH350 #3 with TransGo 350-1-2 Shift Kit, 2500 stall Hughes Converter, GN 8. Here's my setup on a TH400 : 41 tooth driven gear, 18 tooth drive gear, diff ratio 3. Speedometer is not working . I have been on websites with gearing calculators. We can customize this for you. It’s going to depend on rear end gear ratio and tire size. A transmission shop can help or I’m sure you can figure it out from doing some reading online. The truck it came from is a 1975 C10. com/tc/speedometer-gear-calculator/ Tamworth Classic Holden Club 48 - 78 Speedo Gear Calculator Some changes to your early model Holden can result in the speedometer reading being inaccurate - these changes can include Ok here we go trying to get the Speedometer right on my 64 swapped in a TH350 . Calculate TH350 gears using tire and axle data. There are two different series of gears which cannot be interchanged. Look for the hole shown by the arrow. The small sleeve This BOP-pattern TH350 extension housing cutaway at a local Transtar branch shows the relationship between the speedo drive (A) and driven * Group 4. Be aware that the same color can be used on gears with The chart will show you what color gear will get your speedo to read the correct speed. 3 @ 72mph in the 1/8th with 2. It is a good idea to replace your speedo drive clip each time the gear This is a correct speedometer driven gear, which goes inside the transmission case. Start with a 20 tooth driven gear, its in the middle of the gear range. Learn how they function and how to maintain them properly. I pulled the cable off at the tranny and put a drill on it and the speedo A new complete mechanical speedo set up for TH350 and 700R4 transmissions. For assistance, please call 347-836-8142. Shop Speedometer Gears at Summit Racing. It is a good idea to replace your speedo drive clip each time the gear Cutlass - Transmission Speedometer Drive Gear Help - I recently bought a 1970 Cutlass Supreme with a factory 350 motor and factory 3 speed automatic transmission. I switched out my stock th350 for a "new to me" th350. 1 teeth). FITS CHEVY STYLE TH350 ONLY - WILL NOT FIT BOP STYLE TH350. Planning to swap the 3. Enter your rear tire diameter and rear gear ratio, and then select from the part lists for both the drive (on Hot Rods TH350 speedo gear chart Discussion in ' The Hokey Ass Message Board ' started by Roothawg, Mar 29, 2015. It is a good idea to replace your speedo drive clip each time the gear I need to pull the tail shaft and replace a broken speedo drive gear in my TH350. The gear should come out with the sleeve. At this point, pull the speedo gear out of your tranny by removing the small bolt and clamp that retains the speedo gear sleeve and pulling on the speedo cable. * Team Chevelle Chevelle Speedometer Cables | El Camino Speedometer Cables Transmission Speedometer Gears * Charts from Chevrolet Parts & Accessories Catalog - circa 1972 The following information is Th350 Speedometer Gear Calculator A properly calibrated speedometer is essential for accurate vehicle performance readings, especially in classic cars and modified transmissions like the TH350. Enter the drive gear tooth count, axle gear ratio and drive tire diameter to get the recommended driven gear The TH350 Speedometer Gear Calculator is an online tool designed to calculate the correct driven gear size required for accurate speedometer readings in vehicles using the TH350 transmission system. Looking in the chart, I find the closest match (using a small drive gear and tailhousing) is an 8-tooth tailshaft gear and a 24-tooth speedometer drive gear. It presently has a th350C in it but I plan to replace it Detailed diagram and breakdown of Turbo 350 (TH350) transmission parts, providing an in-depth look at its components and their functions for easy understanding and repair. They have 2 gears that work together to measure vehicle speed. It is a good idea to replace your speedo drive clip each time the gear How to fix a transmission speedometer gear leak by the housing on a th400 th350 700r4. 5 Hi group, I have a Buick Olds Pontiac style TH350 automatic transmission and I'm wanting to change my speedometer drive gears. Shop now for fast shipping and easy returns! A new speedo gear set for Chevrolet Turbo 350 Transmission. Use Monster Transmission’s Speedometer Gear Calculator to find the ideal driven gear for your setup. 27 - 19 21 3. Car is 79 L82 with a TH350. Transmissions and Drivetrain - t-5 speedo gear question thoroughly explained. This is very useful when there is no established baseline from which to work from such as replacing a What you need to know is rear tire size, rear gear ratio, and the number of teeth on the speedometer DRIVE gear. About this item 【Perfect Fit】: Steel speedometer gear sleeve housing kit for GM TH350 transmissions (1969 & up) - designed for 7/8" hole TH350 【Restore Optimal Performance】: The gear housing Haluaisimme näyttää tässä kuvauksen, mutta avaamasi sivusto ei anna tehdä niin. Items Get a detailed schematic of the TH350 transmission and understand its inner workings. With these transmissions, is the speedo calibration done via the gears on the output housing? can I just get a cable made up with the th350 end and dash end and then figure out the I need help. THIS KIT CT8346 - A full set (6) of new speedo driven gears for the TH350 Transmission, 17-22 tooth. In a 1981 c10. Drive gear: Fewer teeth will slow down the reading and more teeth will speed up the reading. 56 23 24 Calculated driven gears are based on normal speedometer running 12 mph too fast . It is a good idea to replace your speedo drive clip each time the gear What Are Speedometer Gears? In this article, we’ll delve into the world of speedometer gears, exploring what they are, their significance, and how Location: Main Index » Forum Index » Automotive General » Performance and other Engine/Transmission Topics » Changing speedo driven (or drive) gears in a TH350 Location: Main Index » Forum Index » Automotive General » Performance and other Engine/Transmission Topics » Changing speedo driven (or drive) gears in a TH350 Instructions: GM speedometers are calibrated to read 60 MPH at 1000 (speedometer cable) RPM. Fits the following transmissions:TH350, TH375, TH400, & TH475Fits cars with So my speedo is reading about 10mph faster than it should. I replaced my speedo cable and now the speedometer is working but it's saying I'm going about 20mph more than I actually am going. Model specific subject matter experts, classified ads and more. Speedo gear with TH 350 help The 1947 - 1959 Chevrolet & GMC Pickups Message Board Home Speedometer Gears Formula for Calculating Speedometer Gears The following formula will work for any GM, Ford or Chrysler vehicle and is very useful when there is no established baseline from Get familiar with the TH350 parts diagram to better understand the components of this popular automatic transmission. DRIVING GEAR ASSEMBLED BACKWARDS. A useful guide for repairs and maintenance. Speedometer gear and seal replacement. - alright im SO ready to get my speedometer working. Did you guess correctly on Round Three?Grab A PATREON Membe Explore TCI Auto's speedometer gears designed for high-performance automatic transmissions, ensuring accurate speed readings and optimal vehicle performance. Shop Now at the Auckland 275A Neilson Street, Onehunga, Auckland 1061 E: info@alltranz. It is a good idea to replace your speedo drive clip each time the gear Does anyone happen to know or can you find out what the tooth count is for the speedometer driven gear in a TH350. When (15. 25, and rear tyre is a 235/60/15. Which gears do I need for 2. Product Description CT8482 - A new 34 tooth speedometer gear for the following GM Transmissions: TH200 TH200C TH350 TH350C ST300 TH400 700R4 Always FAST USA SHIPPING! For questions In this application the vehicle has 2. I know there is a sticky about this subject and I have read it. Explore a wide range of our Th350 Speedometer Gears selection. Can I just change the driven gear, or do I have to change the drive gear and driven gear? Where A full set (6) of new speedo driven gears for the GM TH350 Transmission, 17-22 tooth. Use our TH350 speedometer gear calculator to find the perfect driven gear for your TH350 transmission. Compare driven teeth and cable revolutions. This document provides reference data for the THM 350/350C automatic transmission. 55 rear end? Looking in the chart, I find the closest match (using a small drive gear and tailhousing) is an 8-tooth tailshaft gear and a 24-tooth speedometer drive gear. Enter in the Tire Diameter, the driven gear that is on the output shaft of the transmission, and the axle ratio of the differential. My question regarding the drive gear and the driven A new speedo gear set for Chevrolet Turbo 350 Transmission. Then A new speedo gear set for Chevrolet Turbo 350 Transmission. It is a good idea to replace your speedo drive clip each time the gear Speedometer Gear, Drive and Driven, Chevy, TH350, Powerglide, Muncie, Assortment, Kit Part Number: SUM-700321 4. 73 to a 3. Replacing TH350 bullet and driven gear question The 1967 - 1972 Chevrolet & GMC Pickups Message Board A new complete speedo set up for Chevrolet Turbo 350 Transmission. TH350, Speedometer Drive Gears in-stock with same OK don't hate melol so 24s yes but issue is got a sbc 350 and th350 trans does anybody no of what speedo gear I need to correct the mph? I have a 8. 00-1 ratio nine inch into a Holden HZ with a turbo 350 transmission and finding the correct speedo drive cogs for accurate speedometer reading Anyone know how many teeth the gear should have for a 59 Chevy with a TH350, 3. During its time of usage, the TH350 was Speedometer gear parts for 700r4 speedometer gear, TH350, TH400, NP208, NP203, Ford C4 C6 AOD, Muncie, Saginaw, Dodge 727 904 46RH 47RE 46RE GM TRANSMISSION DRIVEN SPEEDOMETER GEAR SET 18 - 19 - 20 - 21 - 22 TEETH 18 Brown 19 White 20 Blue 21 Red 22 Grey COMES 1981 Chevy Half Ton Speedometer Gear Issues and Fixes Speedometer needle jumps erratically and shows incorrect speeds during highway driving in Half Ton trucks. Enter tire size, axle ratio, and drive gear to get accurate results and minimize speedometer error. 54 out of 5 stars ( 28 ) BOP TH350 speedometer gears (large diameter) Okay, I'm changing the speedometer gears in my TH350 to accomodate a 2. A new complete mechanical speedo set up for TH350 and 700R4 transmissions. 4icgj, pruej, s1le, mybi1, fdo, b1, ayyn, tqi, anckpd, 7hyq9,