C3 Corvette Transmission Codes 1977 to 1982

1968 Corvette Transmission Codes

Code	Transmission
S	Saginaw 3-Speed
P	Muncie 4-Speed
K	Turbo Hydra-Matic 400 with 327 Engine
L	Turbo Hydra-Matic 400 with 427 Engine

1969 Corvette Transmission Codes

Code	Transmission
S	Saginaw 3-Speed
P	Muncie 4-Speed
A	Muncie 4-Speed M20 Wide-Range (2.52:1 1st gear)
B	Muncie 4-Speed M21 Close-Range (2.20:1 1st gear)
C	Muncie 4-Speed M22 Close-Range (2.20:1 1st gear) Rock Crusher
K	Turbo Hydra-Matic 400 with 350 Engine
L	Turbo Hydra-Matic 400 with 390 & 400 HP Engine
Y	Turbo Hydra-Matic 400 with 430 & 435 HP Engine

1970 Corvette Transmission Codes

Code	Transmission
P	Muncie 4-Speed, Heavy-Duty Aluminum Case
A	Muncie 4-Speed M20 Wide-Range (2.52:1 1st gear)
B	Muncie 4-Speed M21 Close-Range (2.20:1 1st gear)
C	Muncie 4-Speed M22 Close-Range (2.20:1 1st gear) Rock Crusher
K	Turbo Hydra-Matic 400 with 350 Engine
S	Turbo Hydra-Matic 400 with 454 Engine

1971 Corvette Transmission Codes

Code	Transmission
P	Muncie 4-Speed, Heavy-Duty Aluminum Case
A	Muncie 4-Speed M20 Wide-Range (2.52:1 1st gear)
B	Muncie 4-Speed M21 Close-Range (2.20:1 1st gear)
C	Muncie 4-Speed M22 Close-Range (2.20:1 1st gear) Rock Crusher
K	Turbo Hydra-Matic 400 with 350 Engine
S	Turbo Hydra-Matic 400 with 454 Engine
Y	Turbo Hydra-Matic 400 with 454 LS6 Engine

1972 Corvette Transmission Codes

Code	Transmission
P	Muncie 4-Speed, Heavy-Duty Aluminum Case
A	Muncie 4-Speed M20 Wide-Range (2.52:1 1st gear)
B	Muncie 4-Speed M21 Close-Range (2.20:1 1st gear)
C	Muncie 4-Speed M22 Close-Range (2.20:1 1st gear) Rock Crusher
K	Turbo Hydra-Matic 400 with 350 Engine
S	Turbo Hydra-Matic 400 with 454 Engine

1973 Corvette Transmission Codes

Code	Transmission
P	Muncie 4-Speed, Heavy-Duty Aluminum Case
A	Muncie 4-Speed M20 Wide-Range (2.52:1 1st gear)
B	Muncie 4-Speed M21 Close-Range (2.20:1 1st gear)
CK	Turbo Hydra-Matic 400 with 350 L-48 Engine
CY	Turbo Hydra-Matic 400 with 350 L-82 Engine
CS	Turbo Hydra-Matic 400 with 454 Engine

1974 Corvette Transmission Codes

Code	Transmission
P	Muncie 4-Speed, Heavy-Duty Aluminum Case
A	Muncie 4-Speed M20 Wide-Range (2.52:1 1st gear)
B	Muncie 4-Speed M21 Close-Range (2.20:1 1st gear)
W	Warner 4-Speed, Heavy-Duty Aluminum Case
CK	Turbo Hydra-Matic 400 with 350 L-48 Engine
CZ	Turbo Hydra-Matic 400 with 350 L-82 Engine
CS	Turbo Hydra-Matic 400 with 454 Engine

1975 Corvette Transmission Codes

Code	Transmission
W	Warner 4-Speed, Heavy-Duty Aluminum Case
CK	Turbo Hydra-Matic 400 with 350 L-48 Engine
CZ	Turbo Hydra-Matic 400 with 350 L-82 Engine

1976 Corvette Transmission Codes

Code	Transmission
W	Warner 4-Speed, Heavy-Duty Aluminum Case
AM	Turbo Hydra-Matic 350 with 350 L-48 Engine
XH	Turbo Hydra-Matic 350 with 350 L-48 Engine
CZ	Turbo Hydra-Matic 400 with 350 L-82 Engine

1977 Corvette Transmission Codes

Code	Transmission
W	Warner 4-Speed, Heavy-Duty Aluminum Case
AM	Turbo Hydra-Matic 350 with 350 L-48 Engine
CB	Turbo Hydra-Matic 400 with 350 L-82 Engine

1978 Corvette Transmission Codes

Code	Transmission
S6	Warner 4-Speed, Heavy-Duty Aluminum Case, Wide-Ratio (2.85:1 1st Gear)
ZU	Warner 4-Speed, Heavy-Duty Aluminum Case, Wide-Ratio (2.64:1 1st Gear)
ZW	Warner 4-Speed, Heavy-Duty Aluminum Case, Close-Ratio (2.43:1 1st Gear)
5WB	Turbo Hydra-Matic 350
5TL	Turbo Hydra-Matic 350

1979 Corvette Transmission Codes

Code	Transmission
UH	Warner 4-Speed, Heavy-Duty Aluminum Case, Wide-Ratio (2.64:1 1st Gear)
UK	Warner 4-Speed, Heavy-Duty Aluminum Case, Close-Ratio (2.43:1 1st Gear)
TB	Turbo Hydra-Matic 350
WB	Turbo Hydra-Matic 350

1980 Corvette Transmission Codes

Code	Transmission
ZJ	Warner 4-Speed, Heavy-Duty Aluminum Case, Wide-Ratio (2.88:1 1st Gear)
JC	Turbo Hydra-Matic 350 with 305 California Engine
TW	Turbo Hydra-Matic 350 with 350 Engine

1981 Corvette Transmission Codes

Code	Transmission
CC	Warner 4-Speed, Heavy-Duty Aluminum Case, Wide-Ratio (2.88:1 1st Gear)
8JD	Turbo Hydra-Matic 350 with 350 Engine

1982 Corvette Transmission Codes

Code	Transmission
YA	Turbo Hydra-Matic 700-R4 4-Speed Automatic with Overdrive