-
The Muncie M22 Rock Crusher: A Heavy Duty Monster
Muncie is the brand name of a series of manual transmissions common in GM muscle cars. There are three basic types. The M20 is a wide ratio manual and the M21 is a close ratio manual. However, the M22 is a heavy-duty close ratio manual transmission people often call the “Rock Crusher.” As you probably guessed, the M22 is the most desirable if you own a Camaro, Corvette, Mustang or any muscle car.