The 1965 Chevrolet M22 Rockcrusher Transmission: The Mystical Transmission
This field test was successful and specific design changes were made to the existing Muncie transmission platform to bring M22 production units into existence. A Chevrolet Engineering Change Recommendation #68715 was issued on December 19, 1964, that proposed the changes required to change the M20-21 into the M22 …