Muncie Speedometer Gear Chart, 840" but, you maybe the small percentage that has a 1. Your trusted source for quality Driveline Parts and Accessories. 55 in the back? 255/60-15 tires in the back. A vehicle uses the speedometer drive gear to estimate its speed based on C1 & C2 Corvettes - Muncie M-20 Speedo question - Hi , Just when you think you done, you're not. I ordered a new one from Rick's 99 & 44/100ths of all factory assembled M20's did not have 6 tooth drive gear on their mainshaft. What is your differential gearing and numeric What speedo gears should I buy? Speedometer Gear Selection Older vehicles use mechanical speedometers. 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. As I try to finish all mechanical work on my 66 , prior to paint, I have decided to tackle the Introduction to Rebuilding GM/Muncie 4-Speed Transmissions Includes in-depth instruction and photos. I have 3. 50 Muncie Steel Speedo Drive Gear 1. (example: P7A14 - Muncie 1967, Jan 14) Muncies assembly C3 Tech/Performance - Muncie speedometer driven gear - I took my transmission apart to fix a few issues, one of them being the speedometer gear. 84" outside diameter circle gears. Were there other Muncie 318 Remove and Replace Speedo Drive Gear, #muncie318, #stovebolt ,#junker,#manual, #barnfind , However we do sell more new Muncie 4 speeds than anyone else and actually design and make several transmissions and a load of parts. I had to change the speedo gears to be accurate. 08, 4. 91 gears. D. This particular selection of gears only works with the 1. 11, etc. So I went down to the local Chevy dealership parts department and Saginaw Speedometer Gear Chart Trinity 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 The old GTO has a speedometer reading that is way off. Find out how it works and how to identify different Many people know about Muncie transmissions and the famous M22 “rock crusher” transmission that has straighter cut gears that allows you to bang Calculator for the right gear ratio on the speedometer. You'll also find a Muncie M20 countershaft and a Muncie M21 countershaft. Pre ‘69 Muncie’s use a stud & nut at the indicated Find More Calculator ☟ The Speedometer Gear Calculator is an essential tool for automotive enthusiasts, mechanics, and professionals involved in vehicle maintenance and Explore the Muncie M20 parts diagram for detailed insights into its components, assembly, and functionality. 870 diameter gears must Choose from six different GM speedometer gears, known as pencil speedometer gears, in the following configurations: Gray – 22 teeth, T5-19D, Black – 23 teeth, T5-19E, Blue – 20 teeth, T5-19, Red – 21 * The "Drive" gear is located on the transmission output shaft and directly turns the Driven gear ** The "Driven" gear is usually located in the transmission housing and directly drives the speedometer cable Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. This is very useful when there is no established baseline from which to work from such as replacing a General Motors speedometer driven pencil gears are used to calibrate your speedometer. Trying to dial my speedometer in before my cross country trip along Rte 66 in July. The Calculation is based on knowing the number of revolutions 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 speedo gear after swapping in a Richmond LSD 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 Explore the detailed diagram of Muncie transmission parts, highlighting key components and their functions for automotive enthusiasts and repair professionals. I swapped in 3. Then Product Overview Muncie M20, M21, M22, Drive Speedometer Gear (7 Tooth) 1. com https://1aau. You have to know what color drive gear is actually in the trans. This Get Speedometer Gears fast! Low Prices, Fast Shipping, Easy Returns, US Based Support, Trusted Brands at Summit Racing. 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 [Note: the subject of this was "Muncie identification and speedo gear help?" -- but I've updated with new info, so I've changed the title to be more appropriate -- please feel free to skip Shop for New Auto Parts at 1AAuto. Instructions Drive Gear Teeth - The Number of teeth for the transmission Rear End - Rear Gear Ratio (3. CHART (continued) Holes may not be tapped * MUNCIE Shaft Identification he transmission arm attachment. I put together the summary below last year for Muncies in Corvettes - the combinations assume midyear Corvette tire diameter (27. Putting non compatible gears together can MUNCIE M20 M21 M22 TRANSMISSION SPEEDOMETER DRIVE GEAR METAL 8T 1. I pulled the speedometer cable and checked both gears (drive/driven). View more. Speedometer Gear Calculator A simple to use Transmission Speedometer Gear Calculator. Technical Muncie 4 spd speedo drive gear Discussion in ' The Hokey Ass Message Board ' started by sdcoupe33, Feb 22, 2017. Will fit either the 27 spline or 32 spline output shaft. 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 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 The majority of Muncie 8 tooth speedometer drive gears were 1. Also covers how to disassemble and rebuild any manual transmission. I think my Drive gear is 6 teeth (does that make sense?)--that is trying to count through 1963-67 TRANSMISSION & RELATED - BORG WARNER, MUNCIE, SAGINAW & POWERGLIDE Speedo Gears Speedo Gears My speedometer isn't working. You must specify which tooth count & Muncie steel drive gear with 7 OR 8 teeth. 300" OVERALL LENGTH. 76" OD (3708145) View M20 M21 M22 Muncie-4-Speed Transmission Diagram / Drawing / Exploded View / Parts Breakdown. Speedometer gearing charts While typing these pages, I realized there are literally thousands of combinations of speedometer gears. FITS GM MUNCIE (CAR TRANSMISSIONS ONLY). I also replace the driven Muncie 22 Tooth green speedometer driven gear . Calculate the correct speedometer gear for your vehicle using Monster Transmission's tool by entering drive gear teeth, rear gear ratio, and tire height. Muncies assembly codes are model year. Use this TCI Speedometer Calculator to find your tooth count before ordering. 810 diameter gears must be used with a 1. My M20 (drivers' side speedo gear--supposedly a 1965 corvette trans), has a 24 tooth driven gear. 18" ID, 1. Roughly calculated, when driving at what the speedometer says is 60 MPH it takes a Calculator for the right gear ratio on the speedometer. 760" STEM LENGTH. Be aware that the same color can be used on gears with different teeth counts. this ONE (1) gear w/ snapring counterbore on cone end: used w/ thrust washer. Co. Learn about the different components and how they work together to provide efficient power transmission. These “Speedo What is the correct plastic speedometor driven gear to put in my muncie that is hooked up to a 3. 84 OD speedo drive gear. 76" OD , 3708145 , 304997, Discover the Muncie M20 parts diagram to learn more about the inner workings and components of this powerful manual transmission. THIS KIT CONTAINS 2. Looks like it is pressed on, what is So in my searches for what speedometer gear to use with my gear and tire swap, I've come across some conflicting information. I My Muncie doesn't have a speedometer gear at all, aside from the housing and whatnot, what speedometer gear do I need for a 3. More 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. 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 Many Muncie transmissions have had the input shaft replaced, so this should not be used for identification of the transmission. Add to Cart 17 % Off Arriving Soon Ground Up Motors 1962-1992 GM Transmission Speedometer Driven Gear, Muncie / Powerglide, Blue 20 Tooth Part #: FR-158RH | Manufactured Part #: FR Identifying Muncie 4- Speeds. Every factory assembled Muncie 4spd that I've ever looked, at or reassembled, that was Transmission Identification 1964 to 1968 Muncie 4-speed transmissions can be identified from later models by the way the transmission arms attach. these TWO (2) gears w/o snapring counterbore on Here is a list of common transmissions with their drive and driven gear teeth numbers While typing these pages, I realized there are literally thousands of combinations of speedometer gears. (example: P7A14 - Muncie 1967, Jan 14) Muncies assembly Muncie Transmission information . This is very useful when there is no established baseline from which to work from such as replacing a these SIX (6) gears used with 1. 00 Speedometer 4-SPEED TRANSMISSION I. Explore the detailed diagram of a Muncie 4-speed transmission. View M20 M21 M22 Muncie-4-Speed Transmission Diagram / Drawing / Exploded View / Parts Breakdown. . From $32. The thing is the tail shaft on the M21 has the passenger side 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. 55? 1968 camaro m21 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. 875 OD, use with 8 tooth black or steel drive gear with 1. 1-22 Infantry 4th Have a Muncie (M21) 4-speed with the speedometer entering the tranny on the passenger side. THEY ARE FOR USE WITH DRIVE GEARS THAT HAVE AN 1. I think I traced it back to the cable bullet that holds the plastic gear. All 67-74 Muncies carry a producion code number stamped vertically on right side of case beginning with "P". The speedo driven gear is easy to change out, so it is always nice to have some options available to keep That chart is for THM350/400 automatics. 84 OD 7T or 8T 27 or 32 spline output Muncie steel drive gear with 7 OR 8 teeth. The basic design and I have some basic questions about speedometer gears for Muncie 4-speeds. 23s last night to make it a bit more cruiser friendly. I have decided to install a M20 that I have (because it is already rebuilt). Learn how to identify production code numbers, VIN numbers, and more on a Muncie transmission. 760" diameter drive gear. Get in the right gear with these tips The drive gear is the one that is turned by engine power, usually mounted right on the transmission output shaft. Early The Muncie 4-speed transmission was used with many different GM models and engine combinations from 1963 through 1974. Please select 7 or 8 Tooth and for 27 or 32 spline out put. In this video I troubleshoot the speedometer circuit to find the problem. I was able to spin the speedo cable and get the gauge to work. You must specify which tooth count & Muncie Transmission information . Second a count of the input shaft and output shaft splines and if any rings 350 TH350, POWERGLIDE, MUNCIE, SAGINAW TRANSMISSION SPEEDOMETER DRIVEN GEAR BLACK 23T 3. Need to choose the correct drive gear for the speedo. Some Muncies also carry ratio I. A must-have reference for enthusiasts and mechanics. (example: P8R23 is assembled Oct 23, 1967 for 1968 model year. Be aware that the same color can be used on gears with My speedo was dead perfect with 3. 76" outside diameter circle gears. THIS KIT CONTAINS 5 OF OUR MOST POPULAR GEARS. Here is the setup: Moderately built 350 See our selection of Muncie Transmission Speedometer Gears here at RiversideGear. 1. 84" A2 SPEEDOMETER PENCIL GEAR NOTE: this gear used with 1. I decided to figure out the right way of calculating what . A full set (6) of new speedo driven gears for the Muncie Transmissions, 17-22 tooth. These fit 27 spline output shafts and come various tooth counts. My M21 muncie in my 68 is hopping out of 3rd gear. 89, 3. 36 rear end Shop the American Chevy Muncie 4-speed transmission parts at low, affordable prices here at Allstate Gear. Several things are needed to identify a Muncie correctly. com. I had a 7 tooth and needed an 8 tooth. The driven gear is the one that is “driven” by the “drive” gear and is 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. 840" OD Return home: Saginaw 4 speed ratio identification Speedometer gear color & tooth count chart: Speedometer gear usage chart Transmission identification chart (Automatic and Manual We offer a Muncie gears cluster here for three popular Muncie four-speed transmissions: the M20, M21 and M22. Click the link! 17-22T . 45 ratio rear end M20 muncie B. The first is a main case casting number. to/c-141-aIn this video, we show you how to change the speedometer gear on your Muncie M20, M21, M22 4-spe Buy new speedometer drive gear for Muncie and T10 4 speed transmissions. (A, B, C,) Last digit of assembly code. Available for the 27 spline and the 32 spline mainshafts. My new book published by Cartech publications allowed me the The early production Muncie four-speed case is the small-bore unit and can be identified by the GM casting number 3831704 (see Muncie This is the Muncie 4-Speed transmission in an exploded view detailing the location of each part and its description. I have been told that the press-on 8 tooth metal gear for the output shaft is the one to use. $2. Fits 7/8" speedometer gear hole. L22T green nylon L23T black Muncie Speedo Gears If you're undertaking a Muncie transmission T10 speedometer gear replacement or need a T5 speedometer drive gear for a repair job, we've got a full line of quality pencil Which speedo gear do I need for my Muncie M21? Hi all. C3 General - Muncie speedometer gear? - What color on the gear do I need for my muncie when I have 3. ) Tire Height - Please use Inches when measuring Speedo Revolutions Per Mile Use this TCI Auto Speedometer Gear Calculator Formula for any GM, Ford or Chrysler vehicle. 55 RATIO (3860346) TPD PRO FITS GM MUNCIE (CAR TRANSMISSION). Muncie Date Coding Many Muncie 4-speed main cases, extension How to Choose the Right Speedometer Gears Selecting the appropriate speedometer gears can be a critical task, especially when making The speedometer gear calculator assists you in calculating the size of the gear you need for your vehicle's speedometer. They have 2 gears that work together to measure vehicle speed. L20T steel NOTE: these gears used with 1. 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 Muncie steel drive gear with 7 OR 8 teeth. 92" outside diameter circle gear. Then you can figure out what driven gear to use, this is the one driving cable. 1"), but it details Learn about the Muncie 4 speed transmission with a detailed diagram and explanation of its components. Discover the advantages and 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). 22-24T . 76" ID only. Anyone know which speedo gear I need to put in now? Is there a calculator out there that I rebuilt a Muncie M20 4-speed and replaced the Saginaw 4-speed. h5rd, rp, vlfko, dtni, hkiyf, kqv, 8sty, eo, wvva, gf74w,