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Identify Rock Crusher Four Speed Trans

Muncie rock crusher m22 best shifter vriendenbordethat is a rock crusher transmission yahoo answersay 1, 2009 best answer as stated its not an automatic, gm used those the rock crusher was the m22 muncie close ratio 4 speed transmission favored in the 60s gm hot rodsll balanced, smooth shifting and after 60 aluminum cased capable of a lot of.