muncie m22 rockcrusher transmission. How to Identify a Saginaw Transmission?, · Unlike Muncie transmissions, another staple of GM cars during the era, Saginaw models feature a cast iron case instead of an aluminum one. Saginaws also had shifter arms fitted on .
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 cars. They have the same gear ratios as the legendary M21 but with a heavy duty gearset.