• GM Muncie 4-Speed Decoding Drivin It Home

    M-22 "Rock Crusher" Identification The M-22 close-ratio transmission is easily identified internally from the M-20 and M-21 versions by the angle of the gear teeth. The M-22 was only produced in a close-ratio version so it will not appear on models with high rear-axle ratios (3.55 or lower numerically) unless someone has changed it.

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  • Chevy Muncie M20 M21 M22 4-Speed Transmission Parts

    Contrary to popular belief you cannot tell a 4-speed Muncie is an M22 by looking at the input shaft splines. All M22s use a 26-spline shaft made from a stronger alloy than the other 4-speeds. However GM made both 10- and 26-spline versions of the M20 and M21. There are two ways you can tell the difference between the M21 and the Rock Crusher.

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  • How to Identify a Muncie Four SpeedHot Rod

    2016-7-5 · There also was a second heavy-duty close-ratio version the "Rock Crusher" (M22) that was offered on some of the high-performance big-block models starting with the 1965 Corvette.

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  • Muncie 4 Speed Transmissions

    2014-9-4 · Identifying Muncie 4 Speeds III by Paul Cangialosi The most popular question has to be that everyone thinks they have the famous "rockcrusher" M22 4 speed. This had the same gear ratios as the M21 but with a heavy duty gearset. The reason you may ask Well it wasn t designed so that you could go drag racing on Saturday night or impress

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  • Muncie 4 Speed Transmissions

    2014-9-4 · Serial numbers for Muncie 4 speeds always begin with the letter "P". P stands for Muncie Plant. Not for passenger car as some self proclaimed specialists may think. The letter M was used to ID the Muncie plant for the Muncie 3 speed so P was the next logical letter. The letter O would add confusion since it resembles zero.

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  • MUNCIE M22 4 SPEED NEW GEAR SET CLOSE RATIO Rock Crusher

    Muncie M22 4 Speed Rock Crusher Gear Set 26 Spline GK-M22A. C 477.97 C 6.95 shipping . Muncie M22 4 Sp Gear Set 26 Spline Input 2.20 Close Ratio Rock Crusher Trans. C 514.17 C 25.78 shipping . Muncie M22 4 Speed Gear Set 2.20 Ratio Rock Crusher 10 Spline Input Fits M20 M21.

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  • MUNCIE M22 4 SPEED NEW GEAR SET CLOSE RATIO Rock Crusher

    Muncie M22 4 Speed Rock Crusher Gear Set 26 Spline GK-M22A. C 477.97 C 6.95 shipping . Muncie M22 4 Sp Gear Set 26 Spline Input 2.20 Close Ratio Rock Crusher Trans. C 514.17 C 25.78 shipping . Muncie M22 4 Speed Gear Set 2.20 Ratio Rock Crusher 10 Spline Input Fits M20 M21.

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  • Midwest Muncie Muncie 4 Speed Transmissions And

    MIDWEST MUNCIE Specializes in ONLY MUNCIE 4-SPEEDS unlike any other transmission builder and has been specializing in restoration and building of Muncie 4 speeds since 1976. It is the Home of the Super Muncie. We offer many high quality Muncie 4 speeds for your 60 s to mid 70 s GM car. High Performance Super M22 and Severe Duty M23 for

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  • Muncie 3978764-gm M20-m21-m22 Rock Crusher Speed Tail

    2021-5-13 · Review (mpn HOUSING1966-1974 for sale) HOUSING1966-1974 MUNCIE M20 M21 M22 Rock Crusher 3978764 GM 4 Speed Tail These tail housings also come with a new shifter shaft seal. One of the tail housings has a Helli-coil installed in number 3 housing pictures.

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  • Difference between M21 and M22 NastyZ28

    2008-10-1 · M22 had straighter cut gears. Sounds kind of like a gear drive timing set. Unmistakable sound. I don t know how many people I ve had tell me "Oh ya this thing has a Rock Crusher (colloquial term for M22) in it. I ve only heard the sound of the real deal once.

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  • Muncie 4 SpeedsHomestead

    2005-3-17 · Muncie 4 Speeds the "Rock Crusher" The most popular question has to be that everyone thinks they have the famous " rockcrusher " M22 4 speed. This had the same gear ratios as the M21 but with a heavy duty gearset .

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  • Guide to Muncie M20 M21 and M22 Four-Speed

    2018-8-3 · 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 produced from 1963- 74

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  • GM Muncie 4-Speed Decoding Drivin It Home

    M-22 "Rock Crusher" Identification The M-22 close-ratio transmission is easily identified internally from the M-20 and M-21 versions by the angle of the gear teeth. The M-22 was only produced in a close-ratio version so it will not appear on models with high rear-axle ratios (3.55 or lower numerically) unless someone has changed it.

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  • Muncie four-speeds Hemmings

    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. It is the heavy-duty version of the 2.20 1 ratio M21 four-speed.

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  • Chevy Muncie M20 M21 M22 4-Speed Transmission Parts

    Contrary to popular belief you cannot tell a 4-speed Muncie is an M22 by looking at the input shaft splines. All M22s use a 26-spline shaft made from a stronger alloy than the other 4-speeds. However GM made both 10- and 26-spline versions of the M20 and M21. There are two ways you can tell the difference between the M21 and the Rock Crusher.

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  • Muncie M22Auto Parts SaleShoppok

    1968 muncie m21 m22 case and parts (modesto) i have a good muncie 4 speed transmission maincase apart some parts missing.came in big block corvettes and chevelles camaro z/28maincase g.m. #3925660 in excellent condition 250.date code p8s28other muncie parts 3 never used g.m. clustergearsclose ratio 2.20 1st gearm22- 27-22-19-17 straighter cut gears 200.m21-27-22-19-17

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  • Muncie 4 Speed Transmissions

    2014-9-4 · Identifying Muncie 4 Speeds III by Paul Cangialosi The most popular question has to be that everyone thinks they have the famous "rockcrusher" M22 4 speed. This had the same gear ratios as the M21 but with a heavy duty gearset. The reason you may ask Well it wasn t designed so that you could go drag racing on Saturday night or impress

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  • Muncie m20 vs M21 Hot Rod Forum

    2014-9-9 · M20 has weak internals and case but ok for street and chirping street tires the M21 is a better choice for muscle on the street and a little weekend drag racing but the case is week Ive sheared the case ears off and twisted off tail shafts when running wrinkle wall slicks the M22 (the rock crusher as we racers called them) are designed to take abuse from high HP and high Torque engines and

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  • Muncie Identification The H.A.M.B.Jalopy Journal

    2010-2-21 · Although some claim that the M23 is a rock crusher it is indicated that this box was assembled in both wide and close ratio components and also with straight cut gears common to the rock crusher (M22) transmission. Looks like you have a second design-feb. 28th 1968 M20 or M21. Definitely not a rock crusher(no straight cut gears).

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  • Muncie 4 SpeedsHomestead

    2005-3-17 · Muncie 4 Speeds the "Rock Crusher" The most popular question has to be that everyone thinks they have the famous " rockcrusher " M22 4 speed. This had the same gear ratios as the M21 but with a heavy duty gearset .

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  • Muncie 3978764-gm M20-m21-m22 Rock Crusher Speed Tail

    2021-5-13 · Review (mpn HOUSING1966-1974 for sale) HOUSING1966-1974 MUNCIE M20 M21 M22 Rock Crusher 3978764 GM 4 Speed Tail These tail housings also come with a new shifter shaft seal. One of the tail housings has a Helli-coil installed in number 3 housing pictures.

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  • Muncie Transmission Identification Team Camaro Tech

    2007-11-2 · A muncie and it s bellhousing are the same length as either a powerglide or a T350 and will directly bolt in. Many but not all muncies were "coded" (M20 M21 M22) by grooves cut into the input shaft none 1 or 2 though which is which escapes me.

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  • NEW Muncie M22 SUPER ROCK CRUSHER 4 speed 2399.00

    This product is back-ordered it is unavailable for ordering at this time please come back or continue shopping. Prod. Code AGM22. 2399.00 PLUS S/H ASSEMBLY FEE of 225.00. OPTIONS YOU CAN ADD 150.00 MICRO SUPER FINISH. 35.00 THRUST BUTTON FOR HEAVY LAUNCH AND DOWNSHIFT CASE SUPPORT. SUPER ROCK CRUSHER M22 650 HP.

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  • Magical Muncie Four-Speed Hotrod Hotline

    2021-6-16 · The M22 is called the Rock Crusher. "Dump the Rock Crusher " hot rodders say. People think all Muncie four-speeds are Rock Crushers but they re not. Nowadays there are custom gear ratios and set ups including M21 wide-ratio and M22 wide-ratio units. You can pretty much get what you want. Beefed up boxes for hot rods and Resto-Mods are

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  • Muncie 4-speedChevelle Stuff

    2021-5-19 · 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.

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  • Muncie M22 Community Chevy Automotive Sales Inc.

    Muncie M22 Gear Set 2.20 Ratio Rock Crusher 10 Spline Input Fits M20 M21 4 Speed 479.00 1966 1967 Muncie 4 Speed Transmission Case Chevy Pontiac 3885010 199.95 1964 Up M-22 Rock Crusher Muncie Transmission Coarse 1027 3925660 Case New 2 795.00

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  • Identify General Motors Four-Speed Transmissions

    2017-6-13 · The Muncie four speed was produced in two ratios the wide ratio (M20) and the close-ratio (M21). That being said there was a second close-ratio version (M22) that was developed to survive duty behind engines with a higher torque output and was known as the "Rock Crusher."

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