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  • 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.

  • 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

  • What is a Rock Crusher transmission? Quora

    It's a GM Muncie M22 four speed, used in high performance applications from 1965 to 1972. They had a lower helix angle in the gears and had a noticeable whine that very few other transmissions had. If you were running a GM hotrod, that was the man...

  • what is a rock crusher transmission? Yahoo Answers

    May 01, 2009· 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.

  • 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.

  • 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.

  • When was the M22 first called "rock crusher"? Chevelles

    Apr 27, 2016· The first time I heard the term "rock crusher" was in reference to the transmission in the 1967 L88 Corvette. Due to the low gear angle there is a fair amount of gear noise, really like a medium / heavy duty truck transmission. True enough the M22 did trickle out the door in 1965-67 and was buried in the option lists.

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

    Aug 03, 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

  • When was the M22 first called "rock crusher"? Page 2

    Apr 29, 2016· "Another change for the M22 was the new low helical-angle cut gear set which increased the inner strength of the transmission dramatically. This gearset was quite noisy and from all indications was called the "Rockcrusher" transmission from the beginning by

  • Muncie M22 4 Speed Rock Crusher Gear Whine YouTube

    Sep 03, 2015· A video with better audio of the nostalgic sound of a Muncie M22 (Rock Crusher) transmission at work in a 1966 Chevrolet Chevelle.

  • When was the M22 first called "rock crusher"? Chevelles

    Apr 27, 2016· The first time I heard the term "rock crusher" was in reference to the transmission in the 1967 L88 Corvette. Due to the low gear angle there is a fair amount of gear noise, really like a medium / heavy duty truck transmission. True enough the M22 did trickle out the door in 1965-67 and was buried in the option lists.

  • Chevy Transmissions: Muncie 4 Speed M22 Rockcrusher

    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.

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

    Aug 03, 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

  • When was the M22 first called "rock crusher"? Page 2

    Apr 29, 2016· "Another change for the M22 was the new low helical-angle cut gear set which increased the inner strength of the transmission dramatically. This gearset was quite noisy and from all indications was called the "Rockcrusher" transmission from the beginning by

  • Muncie M-22 Rock Crusher Four Speed Transmission ALL New

    Dec 05, 2020· For sale is a Factory Replica of the Close Ratio Muncie Rock Crusher Four Speed Transmission typically used in High Performance 1965 to 1974 Corvette`s, Camaros, Chevelles, Nova`s, El Camino`s, Impala`s, Oldsmobiles and Pontiacs.. Also included are Hand Fitted Synchronizer Sliders and Hubs. The hand fitted sliders/hubs improves up and down shifting quality through all RPM ranges.

  • Synchromesh and Muncie 4-Speed Transmission

    The M22 is called the Rock Crusher. People think all Muncie four-speeds are Rock Crushers, but they're not. The M20 and M21 came out about the same time in

  • probably a dumb question m-22 rock crusher NastyZ28

    Jun 20, 2012· ROCK CRUSHER it is the smoothest shifting transmission i have ever driven hardly feels like you are crushing rocks i feel a little click every time i shift so i wonder if that is it and yes i checked the numbers it is a true m-22 thanks axle Jun 13, 2012 #2.

  • 68 chevelle muncie m22 rock crusher transmission YouTube

    Jul 20, 2014· muncie m22 rock crusher transmission

  • what manual transmission is called rock crusher

    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. More

  • How to Identify Your Transmission NastyZ28

    Feb 01, 2013· Due to this, the box tends to be noiser (whines or howls almost like a blower, which is why it's called a "rock crusher") than other boxes. The M-21 has a higher pitch angle on its gear teeth. The close ratio gearboxs generally came with 3.73+ gear ratio'ed cars. 3.55 geared and higher (numerically lower) cars used the wide ratio gearbox.

  • the rock crusher transmission

    When was the M22 first called "rock crusher"? Chevelles. Apr 27, 2016· The first time I heard the term "rock crusher" was in reference to the transmission in the 1967 L88 Corvette. Due to the low gear angle there is a fair amount of gear noise, really like a medium / heavy duty truck transmission.

  • Is the Muncie M 22 transmission what they call the rock

    Feb 15, 2014· They break when submitted to modern power levels in modern drivetrains. Which is why *good* transmissions like the T56 exist, and why no one in their right mind would use an M-whatever unless it is a restoration. And no, you don't have a multi-thousand dollar rock crusher.