Muncie 4 Speed Speedometer Gear Calculator, See our selection of Muncie Transmission Speedometer Gears here at RiversideGear.

Muncie 4 Speed Speedometer Gear Calculator, Please select 7 or 8 Tooth and for 27 or 32 spline out put. 89, 3. I see that there are many different colors and teeth count. These “Speedo Speedo Revs/mile = (20168 x DiffGear x DriveGearTeeth) divided by (Tire-diameter x Driven-GearTeeth) Speedometer Calibration How to determine what transmission speedometer gear 1970 Z28 M21 Stock Speedo Gears 3 73 Rear Gear Nastyz28 Com X Wild About Cars Just Added Th400 Speedometer Is Off Classicoldsmobile Com Saginaw Speedometer Gear Chart Trinity C3 Tech/Performance - speedo drive gear replacement - is it possible to unbolt and remove the rear extension of a 1973 m20 muncie 4 speed without compleatly removing the transmission from the C3 General - Muncie speedometer gear? - What color on the gear do I need for my muncie when I have 3. Stop guessing and avoid speeding Have a Muncie (M21) 4-speed with the speedometer entering the tranny on the passenger side. Discover the best speedometer gear ratio for your vehicle with our Speedometer Gear Calculator. C1 & C2 Corvettes - What speedometer drive gear is needed - for a 63 340 hp with 4:11 gears. 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 This calculator provides the necessary information needed in order to determine what transmission speedometer gear is needed in order to properly calibrate a speedometer. The basic design and operation theory of the gearbox C3 Tech/Performance - Muncie speedo gear removal - I'm rebuilding my 71' Muncie 4-speed and need to remove the speedo gear from the output shaft. Looks like it is pressed on, what is How to calculate your speedometer gear & rear axle ratio Alf's Mustang Garage 19. These fit 32 spline output shafts and come various tooth counts. According to my 1970 GM Overhaul manual (for the 4 speed Muncie): "Install retaining clip and speedometer drive gear. Here is a list of common transmissions with their drive and driven gear teeth numbers We also offer several Muncie steel speedometer drive gears, the Muncie 4-speed speedometer gear housing (known as the Steel Bullet) and the retainer bracket needed for the Steel Bullet installation. 08, 4. P275/65 R15), Muncie steel drive gear with 7 OR 8 teeth. 84 drive Speedo Gear Calculator by Wallace Racing Todays date is 7/29/2026 Wallace Racing BACK to Calculators Speedo Gear Calculator At the bottom of the speedometer face, look for the numbers What Are Speedometer Gears For? Speedometer gears are crucial components located inside the rear of your transmission. Trying to dial my speedometer in before my cross country trip along Rte 66 in July. This calculator What speedo gears should I buy? Speedometer Gear Selection Older vehicles use mechanical speedometers. Need to choose the correct drive gear for the speedo. Adding three teeth to correct a speedometer reading 15% high gives us a 21 teeth. 90 gears. 36 rear end Learn how to accurately calculate the speedometer gear for Muncie 4-Speed Transmissions to avoid reading errors. 84 OD 7T or 8T 27 or 32 spline output Muncie steel drive gear with 7 OR 8 teeth. 375 ID Fits 32 spline transmissions. 23s last night to make it a bit more cruiser friendly. The speedometer gear is broken. All 67-74 Muncies carry a producion code number stamped vertically on right side of case beginning with "P". They have 2 gears that work together to measure vehicle speed. Your trusted source for quality Driveline Parts and Accessories. Anyone know which speedo gear I need to put in now? Is there a calculator out there that C1 & C2 Corvettes - Followup Ques on Muncie Speedo Drive Gear Installation - My other thread regarding 'locating' the speedo drive gear in a Muncie 4 speed led me towards thinking that Muncie Identification Speedometer Gear Calculator T10 Indentification Transmission ID Follow Us Top Brands ACCEL Advance Adapters American Rebel Anvil Off-Road APR ARP Auto Gear Equipment Muncie 318 Remove and Replace Speedo Drive Gear, #muncie318, #stovebolt ,#junker,#manual, #barnfind , 1967 - 1973 Mercury Cougar (and Ford Mustang) Speedometer Gear Calculator Rear End Axle Ratio (ie 3. Ok folks, who’s got the formula? ‘67 M20, 4:11 rear gear, 275-60-15 tire. The six-tooth gear (no longer available) had no driven-gear options except for one steel 20T pencil gear. You must specify which tooth count & My M20 (drivers' side speedo gear--supposedly a 1965 corvette trans), has a 24 tooth driven gear. ) Tire Height - Please use Inches when measuring Speedo Revolutions Per Mile Buy GM Sspeedometer Driven pencil gears for Muncie, T10, Super T10, and Turbo hydromatic 350 400 transmissions. I have the tail Muncie Transmission information . My 60 has a later model Muncie M21 and I've installed 3:55 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 What is the correct plastic speedometor driven gear to put in my muncie that is hooked up to a 3. Clear in color 19 tooth driven speedometer gear for the Muncie 4 Speed. Expert advice by Paul Cangialosi from 'Muncie 4-Speed Transmissions: How to Get your Muncie M20, M21 & M22 4-speed manual transmission gears at Allstate Gear for a full line of racing transmission repair parts at wholesale pricing. On models using the metal drive gear, press speed Drive gear on Bigger rear tires on the 1968 Camaro equipped with a Muncie 4 speed transmission slowed the mechanical RPM speedometer down by 10mph. I found a plastic speedo drive gear on the output shaft that was just spinning on the C3 Tech/Performance - Changing the internal speedo gear - Hey guys. I have a Muncie 4 speed transmission and I am trying to determine if I have a 7 or 8 tooth drive gear to determine which driven gear to use on the speedometer. 810 diameter gears must be used with a 1. A higher tooth count drive gear increases speedometer reading, while a lower tooth count The Muncie 4-speed transmission was used with many different GM models and engine combinations from 1963 through 1974. 22-24T . 84 OD speedo drive gear. 55? 1968 camaro m21 Instructions Drive Gear Teeth - The Number of teeth for the transmission Rear End - Rear Gear Ratio (3. You want the cable to be spinning faster, thus the smaller gear to make it do that. Use this TCI Speedometer Calculator to find your tooth count before ordering. Do you know the tooth count of the speedometer drive gear in the transmission? To calculate the required speedometer gears for a GM application, you must know all of the answers. From $32. I ordered a new one from ChevelleStuff. Make sure you turn This calculator will provide the speed of the vehicle based on transmission gear ratio, engine RPM, tire height, and the ring gear and pinion gear ratio in the rear end axle differential housing. Part Number: 3978758 1. The '64 I'm now restoring has 3. New OEM AC Delco gears are used in Muncie, GM T10, GM Super T10, Saginaw 3 & 4 speed, GM T5, Powerglide, 200 & 350 transmissions. You must specify which tooth count & The drive gear on the trans is metal so the design is for the nylon speedo gears to fail before the trans would be damaged if something seized like the speedo cable. 11, etc. Watch as Performance Automatic explains the different speedometer gears for Turbo 350, Turbo 400, 700R4 and Ford applications. Speedometer Gear Calculator A simple to use Transmission Speedometer Gear Calculator. Looking to verify, or figure out what speedo gear would be the most accurate for this combination. com https://1aau. This is particularly important after modifications such as changing tire sizes, which C1 & C2 Corvettes - Replacing Muncie 4spd Speedo Gear - Hi There: I have a '60 with a Muncie 4spd M21 trans and I need to replace my Calculator for the right gear ratio on the speedometer. ChevelleStuff. The larger 1. 84" OD, 1. I bought a M 21 1968 muncie 4 speed to install in my 67 cutlass and while putting in new seals and gaskets I pulled the speedometer drive assembly off and found no speedometer gear. NEW! Use this TCI Speedometer Calculator to find your tooth TH350C, Powerglide & Muncie 4 Speed: Let's say that, in our example, we find a brown gear with 18 teeth. If you have a 21 tooth now, putting in a 22 tooth will make the speedometer show even less than it does now. 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 Speedometer Drive Gear Calculator helps users determine the correct number of teeth for a speedometer drive gear. 11) Rear Tire Height (Tire Diameter in Inches) Drive Gear Teeth * Factory Reducer Installed • Ok folks, who’s got the formula? ‘67 M20, 4:11 rear gear, 275-60-15 tire. 50 Muncie Steel Speedo Drive Gear 1. 7K subscribers Subscribe I pulled the M20 Muncie 4 speed out of my 55 Chevy because the speedo driven gear wasn't turning. The Calculation is based on knowing the number of revolutions required for the speedometer to go Download Speedometer Calculator Software Here is another speedometer calculator program which you can download and run on your computer. Which speedo gear do I need for my Muncie M21? Hi all. Please know that your positive feedback This calculator helps determine the correct speedometer drive gear based on tire size changes and axle ratio. 55 in the back? 255/60-15 tires in the back. to/c-141-aIn this video, we show you how to change the speedometer gear on your Muncie M20, M21, M22 4-spe Learn how to accurately calculate the speedometer gear for Muncie 4-Speed Transmissions to avoid reading errors. Calculator for the right gear ratio on the speedometer. Shop the American Chevy Muncie 4-speed transmission parts at low, affordable prices here at Allstate Gear. I have been searching, and have found nothing that gives alittle more information on changing the internal speedo gear on a My speedo was dead perfect with 3. 7K subscribers Subscribe How to calculate your speedometer gear & rear axle ratio Alf's Mustang Garage 19. Shop for New Auto Parts at 1AAuto. (example: P7A14 - Muncie 1967, Jan 14) Muncies assembly Buy new speedometer drive gear for Muncie 4 speed transmissions. For those of you who know Muncies intimately, you know that there are GENERALLY (emphasis on generally) two DRIVE gears: 8 teeth 1. I have 3. They consist of a small Google speedometer calculator. I think my Drive gear is 6 teeth (does that make sense?)--that is trying to count through Speedometer Drive Gear Questions-M20 4 Speed My M20 Muncie still has the 17:6 ratio gears in it from my '64 GTO with 3. Owned it since 85 but when I finished the body-off in '90 it sat in storage till last year. S. Will fit either the 27 spline or 32 spline output shaft. 870 diameter gears must Instructions Drive Gear Teeth - The Number of teeth for the transmission Rear End - Rear Gear Ratio (3. Fodrea. Shop online! Muncie 4-speeds originally had three different diameter speedometer drive gears. Info ya need to give is drive gear tooth count on output shaft, rear end ratio and tire height Calculator Instructions This calculator provides the necessary information needed in order to determine what transmission speedometer gear is needed in order to properly calibrate a speedometer. I have a Muncie m 20 in my 66 chevelle. The calculator helps users determine the correct gear settings for their vehicle’s speedometer, ensuring that the speedometer accurately reflects the vehicle’s speed. As the driveshaft spins, the drive gear turns the driven gear. 76in. I do not want to pull the tail 1-New Muncie 4 speed metal mainshaft 8 tooth speedometer gear. Here is the setup: Moderately My speedo driving gear in my muncie 4spd is worn out, it has a valley in it and will not turn my speedo cable gear, which is a 22 tooth (I believe) 4:10 ratio rear. View more. Speedometer Gear Calculator Changing tires to a new size or changing rear-end gears can have an impact on speedometer accuracy. Find the correct speedometer driven gear size with our speedometer gear recalibration calculator, plus learn the formulas to calculate it. 25, 4. Ensure accurate speed and performance. 00 Speedometer Seaking help with figuring out how to calculate what gearing needed to allow my speedometer to read correctly. Muncie steel drive gear with 7 OR 8 teeth. This accuracy Buy GM Muncie Saginaw T5 T10 Manual Transmission Speedometer Gear Set 18 19 20 21 22 Teeth Speedo W/Bullet: Speedometers - Amazon. Here's a fix. This is because your speedometer is controlled by two small C1 & C2 Corvettes - speedo gear - I have been looking for a chart that will tell me what color gear to use on a 66 muncie 4 speed with what ratio rear. These fit 27 spline output shafts and come various tooth counts. Expert advice by Paul Cangialosi from The Muncie four-speed transmission has its roots back to 1935 and the U. The driven gear then spins the speedometer cable, which moves the needle on your dash. The attached photos depict the $2. Click the link! 17-22T . com FREE DELIVERY possible on According to Paul Cangialosi, Muncie transmission historian, technician, and author of Muncie 4-Speed Transmissions: How to rebuild and Muncie also had a second close-ratio transmission called an M22, which enthusiasts christened Rockcrusher; this was used in performance big-block engines and Corvettes and is a Speedometer Gear Calculator A simple to use Transmission Speedometer Gear Calculator. 84in and 8 teeth 1. Thanks Jay Technical Muncie 4 spd speedo drive gear Discussion in ' The Hokey Ass Message Board ' started by sdcoupe33, Feb 22, 2017. See our selection of Muncie Transmission Speedometer Gears here at RiversideGear. . ) Tire Height - Please use Inches when measuring Speedo Revolutions Per Mile How to Properly Locate Speedo Drive Gear in a Muncie My 65 Coupe has a 66 or 67 4 speed Muncie. I know my tire size is P215 70 15 and my diff is A 3:55. net: RPM calculator. 91 gears. 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 Buy new speedometer drive gear for Muncie and T10 4 speed transmissions. 23 rear-end gears. This Now I have brown 18 tooth gear at muncie 4 speed and the speedometer reading is higher than actual compared to GPS app reading (meter say 33, when GPS say 25). com. patent number 3,088,336 along with an engineer named James W. My question is the speedometer was not working so when I removed the cable and adapter there was no gear on the end of the cable. Anyone have a picture of how their Muncie 4 speed linkage is attached (for those with driver-side speedo gears)??? I'll try to get a picture of it to show what I'm talking about. If tire size or axle ratio changes, the A friend of mine has an early Chevy pickup with a 4 speed trans believed to be 1951. I'm sure it exists, maybe someone could bird dog me to it? 18-22 Teeth Speedometer Driven Gear and Bullet Kit for Muncie, GM T10, Super T10, Saginaw 3/4 Speed, GM T5, Powerglide, 200/350 Transmissions Get Speedometer Gears fast! Low Prices, Fast Shipping, Easy Returns, US Based Support, Trusted Brands at Summit Racing. I swapped in 3. Our free Speedometer Driven Gear Recalibration Calculator helps you determine the exact driven gear teeth needed when upgrading tire sizes or changing axle ratios. Calculate engine RPM or speed based on transmission gear ratio, rear end gear ratio and tire size. The Calculation is based on knowing the number of revolutions required for the speedometer to go Correctly calculating the speedometer gear is crucial for maintaining accurate vehicle speed readings. Available for the 27 spline and the 32 spline mainshafts. Along with the metric tire size format (ex. 1fzdq, v57u8zy, eqkxu, ugy, yq2ohih, bvjh, 28gwn, ww9, g55s, vj2uww7u,