There is a m22 out called the m22 auto gear. This had the same gear ratios as the M21 but with a heavy duty gearset. The term "rock crusher" refers to the noise made by the meshing of the strong-er helical gears in the M22. Almost gone. The M22 was created for the Corvette Grand Sport racing program. However, the rock crusher was only equipped in cars that had highperformance big blocks, including the corvette, camaro, firebird and chevelle thanks to the similarities between the m, m and m transmissions, you can use a combination of muncie speed transmission parts to build the transmission you want for your … 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. Part of what can kill a Muncie is the sudden or sustained high torque load that will thrust the gear cluster into the back of the case. The M20 and M21 were both release in 1963, but it wasn’t until 1965 that the M22 hit the market. Muncie M22 "Rock Crusher 4 SPEEDS FROM 1965 TO 1974: This page is devoted to OEM Complete units; New aftermarket units and OEM parts and NOS parts. 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. Email us with your requirements and we will assist you in completing your M22 rebuild or providing you with a complete trans. 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. Muncie 4 speed rock crusher gear ratio. They are POS' but todays standards, since back then they couldn't actually put the power to the ground due to the tires and suspension. 22 rock crusher 4 gear trans co uncie m22 rock crusher 4 speeds from 1965 to 1974 this page is devoted to oem complete units new aftermarket units and oem parts and nos parts 220 first gear or wide ratio 252 first gear the wide ratio m22 gear set is base View All Muncie m22 rockcrusher … Seller 99.8% positive. Chevy Muncie M20 M21 amp M22 4 Speed Transmission Parts. Muncie Transmission Super Case GM 64-74 4 speed 18-410-002 1" pin M20 M21 M22. These M22 units are highly sought-after for performance applications. $306.48 + shipping. MUNCIE M22 ROCK CRUSHER 4 Speed Transmission Gear Set 2.20 Ratio 10 Spline GKM22. They have the same gear ratios as the legendary M21 but with a heavy duty gearset. Todays vehicles would destroy the M22 as the aluminum housing design is a serious problem. $365.89 + shipping. The reason you may ask? NEW DESIGN MUNCIE M22 ROCK CRUSHER CLOSE RATIO 4 SPEED. It is a common misconception that all Muncie transmissions are “Rock Crushers”, but it is only the M22 that deserves that name. Muncie M22 Rockcrusher, Borg Warner Super T10 or Turbo 400 Discussion in 'Transmission & Driveline Topics' started by Spencer77, Aug 22, 2012. This is by far the "BEST" replacement aluminum case ever built for a Muncie The front bearing is a "SEALED" bearing and slightly thicker than the original Muncie s . Its rated for 750 HP. Only the M22 is a "rock crusher" and it's almost a certainty you don't have one. M22 Rock Crusher 4 Speed Ifereutlingende. The 454s used the M22 through 1972 because of the added torque. I also have what I believe is an M21, but I'm not certain. 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. We have rebuild kits in stock and ready for shipment. MUNCIE M22 ROCK CRUSHER 4 Speed Transmission Gear Set 2.20 Ratio 26 Spline. The low angle gears of the M22 mean that there is less rearward thrust of the gear cluster. THIS IS THE M-22 TRANSMISSION THAT GM COULD NOT BUILD Newly designed STATE-OF-THE-ART Muncie front case from "Auto Gear". 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). The M22 was eventually dubbed the “Rock Crusher”. The man you would want to talk to is Reed transmission in Conn. Last edited: Aug 23, 2012.