• Muncie four-speeds Hemmings

    The 2.20:1 ratio is commonly designated as the Muncie M21 transmission. The 2.56:1 ratio is commonly referred to as the M20. Muncie also had a second close-ratio transmission designated M22 and often referred to as the "rock-crusher," which was used behind the highest-performance engines and in Corvettes, the M22 is a highly sought-after performance transmission.

  • Guide to Muncie M20, M21, and M22 Four-Speed

    Aug 08, 2018· The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet's big-blocks in the mid-1960s. The M20 and M21 transmissions

  • Muncie 4-speed Transmissions Hemmings

    The 2.20:1 ratio first gear is usually referred to as the Muncie M21 transmission; based on GM's production codes. The 2.56:1 ratio is referred to as the M20. Muncie also had a second close-ratio transmission coded M22 and known as the "rock crusher," which was used behind performance big-block engines and in some Corvettes.

  • Brand New SUPERCASE M22 4-Speed Muncie

    This a BRAND NEW SUPERCASE M22 4-Speed Muncie Rockcrusher Style Transmission. Each new Auto Gear transmission is built from genuine Auto Gear parts, the highest quality available. This is a BEEFY version of the original Rock Crusher transmission.

  • 1971 M22 Rock Mining Mill Transmission Gear Ratios

    M-21 close ratio 66-70 . Muncie M22 4 Speed Rock Crusher Gear Whine . 3-9-2015· A video with better audio of the nostalgic sound of a Muncie M22 (Rock Crusher) transmission at work in a 1966 Chevrolet Chevelle. A video with better audio of the nostalgic sound of a Muncie M22 Muncie M22 4 Speed Rock Crusher Gear Whine relicrestorerman.

  • Muncie 4-speed

    The M22 transmission has a 20 degree helix angle on the gear set as opposed to a 45 degree angle found on the M20 and M21 and were made with a higher nickel alloy. The straighter angle was designed to produce less end loading of the gear train and less heat but created more noise, thus the nickname "Rock Crusher" was born.

  • Muncie 4-speed Transmission (Group 4.000)

    3925661 1971-'74 The 2.20:1 ratio first gear is usually referred to as the Muncie M21 transmission; based on GM's production codes. The 2.56:1 ratio is referred to as the M20. Muncie also had a second close-ratio transmission coded M22 and known as the "rock crusher," which was used behind performance big-block engines and in some Corvettes.

  • Auto Gear Super Case M22Z Rock Crusher 4-speed.

    STRONGEST Direct Replacement M22 With NEW Muncie AUTO GEAR SUPER CASE With The Strongest M22z ULTRAWIDE RATIO 4 SPEED TRANSMISSION. A GREAT HEAVY DUTY ROCKCRUSHER FOR YOUR CAMARO, NOVA, CHEVELLE, CORVETTE, GTO,442. THE MAIN CASE IS THE STRONGEST MADE with fill and drain plugs. C355 Forged Aluminum Mid-Plate. AG Roller

  • NEW Muncie M22 SUPER ROCK CRUSHER 4 speed

    The Gear Box is the source for Muncie Parts like the new assembled M22 SUPER ROCK CRUSHER 4 speed kit with micro super finish or downshift case support. The Gear Box Transmissions Muncie-Tremec-Saginaw-TKO-Top Loader-Richmond

  • Muncie 4-Speed: The Complete History Chevy DIY

    The M22 first gear has an angle of 14.5 degrees and the input shaft is 24.2 degrees. The standard first-gear sleeve is on the top and the sleeve for the M22 is on the bottom (GM PN 3932228). It has flats ground into it to promote better oiling so that first gear does not seize to it.

  • Brand New SUPERCASE M22 4-Speed Muncie Rockcrusher Style

    This a BRAND NEW SUPERCASE M22 4-Speed Rockcrusher Style Transmission. Each new Auto Gear transmission is built from genuine Auto Gear parts, the highest quality available. This is a BEEFY version of the original Rock Crusher transmission.

  • 1971 CHEVROLET CAMARO 5.7L 350cid V8 Gear RockAuto

    Manual trans.; 4 speed trans.; Muncie M22 Close Ratio Gear Kit, Includes Input Shaft, Cluster Gear, 1st Gear, 2nd Gear, 3rd Gear, and Front Reverse Idler Gear, Fits Transmission Cases With The 1 in. Cluster Pin, Case Casting Numbers 3885010, 3925660, and 3925661

  • Auto Gear Super Case M22Z Rock Crusher 4-speed. Perfect

    STRONGEST Direct Replacement M22 With NEW Muncie AUTO GEAR SUPER CASE With The Strongest M22z ULTRAWIDE RATIO 4 SPEED TRANSMISSION. A GREAT HEAVY DUTY ROCKCRUSHER FOR YOUR CAMARO, NOVA, CHEVELLE, CORVETTE, GTO,442. THE MAIN CASE IS THE STRONGEST MADE with fill and drain plugs. C355 Forged Aluminum Mid-Plate. AG Roller

  • 1971 Pontiac Firebird Trans Am

    Three transmissions were offered, the standard M13 three speed HD manual, the RPO M40 TurboHydraMatic 400, or the close ratio four speed manual RPO M22 rock crusher transmissions. The gearboxes were ideally matched for the generous levles of torque the 455 could supply.

  • M21 M22 4 Speed Muncie Manual Transmission Midwest

    Having issues diagnosing problems with your M21 M22 4 Speed Muncie Manual Transmission? we can help. Below you will find a detailed parts list for the M21 & M22 manual transmission that includes complete rebuilt transmissions bearing rebuild kits with and without synchro rings, gaskets and seals, small parts kits, bushings, individual bearings, slider, synchro rings, forks, gears and shafts.

  • Muncie 4-Speed: The Complete History Chevy DIY

    The M22 first gear has an angle of 14.5 degrees and the input shaft is 24.2 degrees. The standard first-gear sleeve is on the top and the sleeve for the M22 is on the bottom (GM PN 3932228). It has flats ground into it to promote better oiling so that first gear does not seize to it.

  • List of GM transmissions Wikipedia

    Muncie M62/M64 — 3-speed longitudinal transmission made by GM; Muncie SM420 — 4-speed manual used up to 1967, very similar to sm 465 except small changes to gear ratios and location of reverse. New Process Gear NP435 4-speed longitudinal transmission

  • The Mighty & Majestic Muncie 4 Speed Transmission Wilson

    The M22 was eventually dubbed the “Rock Crusher”. It is a common misconception that all Muncie transmissions are “Rock Crushers”, but it is only the M22 that deserves that name. The M20 and M21 were both release in 1963, but it wasn’t until 1965 that the M22 hit the market. The M22 was created for the Corvette Grand Sport racing program.

  • Muncie 3 speed transmissions Chevelles

    Feb 27, 2019· GTO 3-Speed Transmission, 1972 GTO, Heavy Duty 3-speed transmission, Dearborn, Muncie, M13, M12, Muncie M20, M22 rock crusher, Auto Round-Up MagazineA: L.C., thanks for the nice words. The transmission listed on the build sheet you sent me is indeed the Heavy Duty 3-speed transmission I spoke of in the a recent Auto Roundup/Car Collector Corner

  • The 1965 Chevrolet M22 Rockcrusher Transmission: The

    Sep 15, 2010· Across the top of the page are the words “First Build 4/15/65 1st Shipment 4/19/65, recap of M22 (Rock Crusher) Trans.” By comparing these M22 transmission assemblies to Chevrolet’s 1965 transmission identification codes, I found a perfect match.

  • Brand New SUPERCASE M22 4-Speed Muncie Rockcrusher Style

    This a BRAND NEW SUPERCASE M22 4-Speed Rockcrusher Style Transmission. Each new Auto Gear transmission is built from genuine Auto Gear parts, the highest quality available. This is a BEEFY version of the original Rock Crusher transmission.

  • Muncie M22 Rockcrusher Close, Wide and NEW Transmission

    New Muncie M22 2.20 close ratio or 2.52 wide ratio Rockcrusher gear set is availabe with either a 10 or 26 spline input. Close ratio 26 spline gear sets available in Italian or Korean made. You must select whether you need a wide or close ratio & which input spline count, 10 or 26. Fits all Muncie applications with 1" countershaft pin, 1966-74.

  • 1971 Pontiac Firebird Trans Am

    Three transmissions were offered, the standard M13 three speed HD manual, the RPO M40 TurboHydraMatic 400, or the close ratio four speed manual RPO M22 rock crusher transmissions. The gearboxes were ideally matched for the generous levles of torque the 455 could supply.

  • 1971 M22 Rock Crusher Transmission Gear Ratiosstone

    We have 1971 M22 Rock Crusher Transmission Gear Ratiosstone Crushers,1971 m22 rock crusher transmission gear ratiosm21 rock crusher saginaw transmission this page will describe general transmission information with the exception of the saginaw transmission and the t10 is stronger than the m22 rock crusher more info gm muncie 4 speed decoding drivin it home

  • Magical Muncie Four-Speed Hotrod Hotline

    An M22 retains less heat due to the straight-cut gear design and the lack of thrust that helical-cut gears create. An M-22 holds up well. The downside is that it tends to make noise. It will rattle at low rpms and whine at higher rpms. The M22 is called the Rock Crusher. “Dump the Rock Crusher,” hot rodders say.

  • The Mighty & Majestic Muncie 4 Speed Transmission Wilson

    The M22 was eventually dubbed the “Rock Crusher”. It is a common misconception that all Muncie transmissions are “Rock Crushers”, but it is only the M22 that deserves that name. The M20 and M21 were both release in 1963, but it wasn’t until 1965 that the M22 hit the market. The M22 was created for the Corvette Grand Sport racing program.

  • Stock Muncie torque/hp rating? Team Camaro Tech

    Dec 19, 2008· Because someone will ask, I used to make 2.72 and 2.96 custom ratio Muncie transmissions for use with 277 to 310 CID small block engines. You should be able to figure the torques for the M20/M21 ratios from the 2.96 test data. With the proper rear end gear a new M22

  • Muncie 4 Speed Transmissions

    The new Muncies being built today have some better ratios.Today's examples of the new car gear set ups are Mustang GT's with a 3.35 1st gear and 3.08 rear. New Camaros with a 2.68 1st gear, 3.73 rear gear and .59 overdrive. ZR1's with a 2.68 1st gear, 3.54 rear gear and a .59 overdrive. Get the picture?

  • Muncie 3 speed transmissions Chevelles

    Feb 27, 2019· GTO 3-Speed Transmission, 1972 GTO, Heavy Duty 3-speed transmission, Dearborn, Muncie, M13, M12, Muncie M20, M22 rock crusher, Auto Round-Up MagazineA: L.C., thanks for the nice words. The transmission listed on the build sheet you sent me is indeed the Heavy Duty 3-speed transmission I spoke of in the a recent Auto Roundup/Car Collector Corner

  • The 1965 Chevrolet M22 Rockcrusher Transmission: The

    Sep 15, 2010· Across the top of the page are the words “First Build 4/15/65 1st Shipment 4/19/65, recap of M22 (Rock Crusher) Trans.” By comparing these M22 transmission assemblies to Chevrolet’s 1965 transmission identification codes, I found a perfect match.

  • Muncie M21 M22 Manual transmission parts, overhaul kits

    M-21 close ratio, and the extra heavy duty close ratio" M-22, also known as the "Rock Crusher". The M-22 was generally installed behind severely powerful (high torque) big-block engines. The M-22 is distinguished from an M-21 by the angle of the gear teeth.

  • Inside the N-series M23 Transmission from Auto Gear

    Apr 03, 2019· GS: We duplicate the M20 and M21 gearset, and the M22 "Rock Crusher" in three ratios (2.20:1, 2.56:1 and 2.98:1 First gears). For our "severe duty"

  • How to Identify a M22 Rock Crusher It Still Runs

    An M-22 "Rock Crusher" is a Muncie four-speed transmission for cars made by General Motors in the 1960s. Identify a transmission type correctly before fitting it into your car. If you have the incorrect transmission, your car may not function properly. You can identify several unique signs that

  • NEW Auto Gear Super Case Muncie M22 4-Speed Rock-Crusher

    New Super Heavy Duty Direct Replacement and Strongest M22’s Made With Muncie Auto Gear Super Case and Strongest M22 Close Ratio or Wide Ratio Gears. 10 OR 26 spline input and large 27 OR 32 spline output shaft. C355 Forged Aluminum Mid-Plate. Super Tail. AG Roller Side Cover. A great