Why It Matters
Warner wide- and close-ratio four-speeds used W identification; M40 covered AM-code THM350 L48 and CB-code THM400 L82 automatic paths. Case, code, date, ratio, shifter, linkage, drivetrain compatibility, and paperwork must agree.
Also Known As
1977 Corvette Warner four-speed1977 Corvette M201977 Corvette M211977 Corvette Turbo Hydra-Matic
