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M22 Rock Crusher Identification

Manual transmissions the 1966 chevelle reference cd0221 february 21 date stamping on 1966 muncie 4speed transmission3885010, 1965 1967, m20 2 1st, m21 2 1st, m22 2 1st train and less heat but created more noise, thus the nickname rock crusher was bornfound on a lower bolt of the side cover, it will help identify a 1966 muncie transmission.