Why It Matters
The standard M20 wide-ratio and L82-only M21 close-ratio four-speeds used Warner identification, while M40 identified the Turbo Hydra-Matic. Case, code, date, ratio, shifter, linkage, drivetrain compatibility, and paperwork must agree.
Also Known As
1975 Corvette Warner four-speed1975 Corvette M201975 Corvette M211975 Corvette Turbo Hydra-Matic