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  • how to identify a muncie four speed: build date codes

    Jul 29, 2016 · Last time we talked about how to distinguish a Muncie four-speed transmissionfrom a Saginaw or BorgWarner and the different types of Muncie …

  • 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

  • muncie 4 speed transmissions

    The dead 2.20 first gear ratio which is the same in the M21 is not that good for off the line acceleration. You would need at least a 4.56 rear end gear to compensate for the dead first gear. That was OK when gas was cheap in 1967 and you did not mind pulling 3000 RPM at 50 MPH while going to work

  • identify general motors'four-speed transmissions

    Jun 13, 2017 · 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.”

  • how to identify a m22rock 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 identify an

  • muncie 4-speed identification guide- chevy diy

    The 1969–1974 Muncies received a ratio designator at the end of the serial number: “A” for M20, “B” for M21, “C” for M22. An example is P2D23B. This is April 23, 1972, M21 ratio. It’s also not uncommon to see double stamps or sometimes even double letters at the end

  • 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 identification| the

    Feb 21, 2010 · The most well known Muncie transmissions are the M20 (wide ratio), M21 (close ratio), and the M22 (rock crusher). Although not mentioned much, there was also an M23 transmission that was used, beginning in 1970. The M23 is recognized by a 26-spline (fine) input shaft and a large output shaft that requires a T-400 driveshaft yoke

  • guide to muncie m20, m21, andm22four-speed transmissions

    Aug 07, 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 produced from 1963-'74 are easy to …

  • guide to muncie m20,m21,and m22 four-speed transmissions

    The M22 Rock Crusher would come later to accommodate the heavy twist of Chevrolet’s big-blocks within the mid-1960s. The M20 and M21 transmissions produced from 1963-’74 are straightforward to determine in each wide- and close-ratio models. The M22 to come later in 1967-’74 can also be a close-ratio unit, however a lot stronger than the

  • muncie 4-speed transmissions | hemmings

    You can identify the various M20, M21 and M22 transmissions by the input shaft. GM marked these units in this way so production line laborers could identify them during installation. Here is a quick spline-groove identification chart:

  • muncie m21 and m22manual transmission gm overhaul kit

    Information and parts are provide for the following Transmission: Muncie M21 / M22 4 Speed (RWD), an illustrated parts drawing for the M21 is provided. IDENTIFICATION - Aluminum case, extension housing and side cover. The side cover has 7 bolts and 2 shifter cams. The synchro rings have 36 teeth and the unit has a 4-step cluster gear

  • how toidentify an m22 rock crusher transmission

    Find out how we did this with parts from Summit Racing! ... put into, with the M20, M21, and Rock Crusher M22 models all part of the hot rod vernacular. Get Price. ... 2 rings, or no rings at all. M-22 “Rock Crusher” Identification The M-22 close-ratio transmission is easily identified... Get Price. 1971 Pontiac Firebird Trans Am.

  • the 1965 chevroletm22 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 Muncie Rockcrusher Style Transmission. This is a BEEFY version of the original Rock Crusher transmission. Most all the weak points of an original Muncie have been solved by the Super-Case design. The Supercase has extra casting in all the known weak areas. The mid plate is aircraft grade aluminum

  • muncie m22 rock crusherfor sale | ebay

    1 product rating - 64-74 NOS MUNCIE BEARING RETAINER 3915020 M20 M21 M22 Rock Crusher COPO