GM Muncie 4-Speed Decoding The Muncie 4-speed transmission was used with many different GM models and engine combinations from 1963 through 1974. The basic design and operation theory of the gearbox changed little during this period, however several design upgrades and modifications were made during the total production run.
2009-03-30· 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.
Muncie M-22 Rock Crusher Four Speed Transmission . MUNCIE M-22 Rock Crusher Four Speed Transmission New Gears WIDE RATIO $1 795 00 For sale is a rare WIDE Ratio Transmission for 57 thru 74 GM products including Grand Sport Corvette Chevrolet Oldsmobile Buick and Pontiac and is a rare opportunity to own a virtually brand new M-22 WIDE Ratio Rock ...
"Where Our Customers Send Their Friends" 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.
"Dump the Rock Crusher," hot rodders say. People think all Muncie four-speeds are Rock Crushers, but they're not. 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.