• Muncie 4-Speed Identification Guide - Chevy DIY

    Sep 15, 2010· On this document the 4 speed transmission option code listed the transmission as an M20. In 1965, all 4 speeds were ordered initially by the M20 4 speed designation. Depending upon the rear axle ratio, Chevrolet supplied either the M20 wide ratio or M21 …

  • Chevy Transmissions: Muncie 4 Speed M22 Rockcrusher ...

    Gm Muncie Input Shaft M21 Chevy 4 Speed 10 Spline 26 Tooth 2.20 Ratio Awt297-16. ... Chevy Gm New Muncie M22 Rock Crusher Wide Ratio 4 Speed Transmission 10 Spline . $2,195.00. Reverse And . Reverse And Idler Gear Set Muncie M20 M21 M22 Chevy 4 Speed Prt-019 K-304587. $63.50. Hurst 4 . Hurst 4 Speed Levers Arms For Late Model Gm Chevy Muncie ...

  • Midwest Muncie | Muncie 4 Speed Transmissions And Rebuild Kits

    Mar 30, 2009· I was just wondering how many different variations there are of the Muncie 4 speed and which ones are best and for what reason(s). I currently have an M22 Rock crusher in my '56 Chevy pickup, and have another M22 that was rebuilt about 6 years ago by my father but never used. I also have what I believe is an M21, but I'm not certain.

  • How to Identify a Muncie Four Speed: Build Date Codes ...

    How to Identify a M22 Rock Crusher by Janos Gal . 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 ...

  • GENERAL MOTORS MUNCIE 4-SPEED MANUAL TRANSMISSION

    Because M21 is just a code, later Corvettes or other 4-speed cars didn’t have Muncies; those equipped with a Super T10 4-speed could have an M21 or an M20 code. Window and tank sticker resources reveal that there was never an M21 option printed on a sticker before 1966, even though many M21s existed I believe the final-drive

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

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

  • Muncie four-speeds | Hemmings Daily

    To understand the evolution of the Muncie 4-speed you have to look at a series of engineering platforms that led to the final design of this transmission. The Muncie design has roots going back to 1935. I took the time to research the patent number that is cast into most Muncie main cases. It is …

  • M23 'RockCrusher, Best 4 speed trans, Chevy and GM - YouTube

    Sold at 2250 $ Used 1971 chevelle muncie m22 close ratio "rock crusher" 4 speed transmission. fine spline input shaft and large output shaft. i do not know the history on this transmission. i have owned it for at least 20 years have never ran it in a. 4/5(36) M-22 Rock Crusher 4-Speed Transmissions by … Diese Seite übersetzen

  • Magical Muncie Four-Speed | Hotrod Hotline

    May 01, 2009· The Rock crusher was the M-22 Muncie close ratio 4 speed transmission favored in the '60's GM hot rods.Well balanced, smooth shifting and …

  • How to Identify a Muncie Four Speed - Hot Rod

    Chevy Transmissions: Muncie M22 “Rock Crusher 4 Speeds were made From 1965 TO 1974: The most popular transmission of it’s time for high performance cars built for Chevrolet and all performance oriented G.M cars. They have the same gear ratios as the legendary M21 but with a heavy duty gearset.

  • Muncie 4 Speed Transmissions

    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 popular, too. “ When rebuilding a Muncie four-speed you can take a ’65 case and ...

  • Muncie 4-Speed: The Complete History - Chevy DIY

    Dave on Muncie Super Duty M23 Super Case 4-speed Road or Drag Racing Rock-Crusher. SALE ends soon! Shawn Riley on Muncie Super Duty M23 Super Case 4-speed Road or Drag Racing Rock-Crusher. SALE ends soon! Michael OBrien on NEW Auto Gear Super Case Muncie M22 4-Speed Rock-Crusher Street/Strip. Camaro, Corvette, Chevelle, Nova.

  • M21 M22 4 Speed Muncie Manual Transmission - Midwest ...

    Aug 03, 2018· GM’s goal with the Muncie four-speed was to produce a better shift employing larger synchro cones. He tells us both the M20 wide-ratio and M21 close-ratio transmissions were first offered in …

  • The 1965 Chevrolet M22 Rockcrusher Transmission: The ...

    Jul 05, 2016· The Muncie four-speed transmission was used with many different models and engine combinations from 1963 through 1974. ... and the close-ratio (M21…

  • Muncie 4 speed....M21, M22, Rock Crusher? | The H.A.M.B.

    Sep 23, 2018· 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.

  • Chevy Muncie 4 Speed For Sale - Vintage Car Parts

    general motors muncie 4-speed manual transmission assemblies, gears & parts applications: general motors ... general motors “muncie” four speed 10-1-01 4 c13 c7 c8 c9 c10 c11 c12 c5 c4 c5 c4 c5 c3 c2 c3 c5 c4 c5 c4 c5 c1 c6 auto gear ... m22 ‘rock crusher’ (1971-74) 3978761 wt297-16z note: these (3) gears used with 26 spline clutch. ...

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

    Jul 25, 2017· M23 'RockCrusher, Best 4 speed trans, Chevy and GM A lot of people may not be aware of this, because it's not advertised much. Most people that have an old muscle car or a …

  • muncie rock crusher 4 speed transmission - Products ...

    The M21 & M22 is a four speed, RWD or 4WD transmission. The M21 & M22 is a Muncie engineering design, this transmission is aluminum case, extension housing and side cover. The side cover has seven bolts and two shift cams. The synchro rings have 35 teeth and the unit has a 4 step cluster gear.

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

  • How to Identify a M22 Rock Crusher | It Still Runs

    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.