1968
- 1982 Corvette Specification Guide
(1968-82
Rear Axle Ratios & Identification Codes)
1968-1969
Rear Axle Ratios & Identification Codes
|
Code |
Ratio |
Type |
| AK |
3.36:1 |
Standard (327/350) |
| AL |
3.08:1 |
Positraction (327/350) |
| AM |
3.36:1 |
Positraction (327/350) |
| AN |
3.55:1 |
Positraction (327/350) |
| AO |
3.70:1 |
Positraction (327/350) |
| AP |
4.11:1 |
Positraction (327/350) |
| AS |
3.70:1 |
Standard (327/350) |
| AT |
3.08:1 |
Heavy
Duty Positraction (427) |
| AU |
3.36:1 |
Heavy
Duty Positraction (427) |
| AV |
3.08:1 |
Positraction (427) |
| AW |
3.08:1 |
Heavy
Duty Positraction (427) |
| AY |
2.73:1 |
Heavy
Duty Positraction (427 Turbo Hydra-Matic) |
| AZ |
3.55:1 |
Heavy
Duty Positraction (427) |
| FA |
3.70:1 |
Heavy
Duty Positraction (427) |
| FB |
4.11:1 |
Heavy
Duty Positraction (427) |
| FC |
4.56:1 |
Heavy
Duty Positraction (427) |
Note: 1968-69
Corvette rear axles were manufactured at Warren and are suffixed
"W". 1969 models built after approximately August
of 1969 use 1970 coded rear axles.
1970
(& Late 1969) Rear Axle Ratios & Identification Codes
|
Code |
Ratio |
Type |
| CAK |
3.36:1 |
Standard (350) |
| CAL |
3.08:1 |
Standard (350) |
| CAM |
3.36:1 |
Positraction (350) |
| CAN |
3.55:1 |
Standard (350) |
| CAO |
3.70:1 |
Positraction (350) |
| CAP |
4.11:1 |
Standard (350) |
| CAS |
3.70:1 |
Standard (350) |
| CAT |
3.08:1 |
Heavy
Duty Positraction (454) |
| CAU |
3.36:1 |
Heavy
Duty Positraction (454) |
| CAV |
3.08:1 |
Standard (454) |
| CAW |
3.08:1 |
Standard (454) |
| CAX |
3.36:1 |
Heavy
Duty Positraction (454) |
| CAY |
2.73:1 |
Positraction
(454 Turbo Hydra-Matic) |
| CAZ |
3.55:1 |
Heavy
Duty Positraction (454) |
| CFA |
3.70:1 |
Positraction
(454) |
| CFB |
4.11:1 |
Heavy
Duty Positraction (454) |
| CFC |
4.56:1 |
Heavy
Duty Positraction (454) |
| CLR |
3.36:1 |
Standard (454) |
Note: Positraction
became standard equipment on the 1970 Corvette and the inclusion of
non-Positraction (standard) axle codes by Chevrolet is in conflict.
1971
Rear Axle Ratios & Identification Codes
|
Code |
Ratio |
| AA |
3.55:1 |
| AB |
3.70:1 |
| AC |
4.11:1 |
| AD |
4.56:1 |
| AW |
3.08:1 |
| AX |
3.36:1 |
| LR |
3.36:1 |
1972
Rear Axle Ratios & Identification Codes
|
Code |
Ratio |
| AA |
3.55:1 |
| AB |
3.70:1 |
| AC |
4.11:1 |
| AX |
3.36:1 |
| LR |
3.36:1 |
1973-74
Rear Axle Ratios & Identification Codes
|
Code |
Ratio |
| AA |
3.55:1 |
| AB |
3.70:1 |
| AC |
4.11:1 |
| AW |
3.08:1 |
| AX |
3.36:1 |
| LR |
3.36:1 |
1975
Rear Axle Ratios & Identification Codes
|
Code |
Ratio |
| AA |
3.55:1 |
| AB |
3.70:1 |
| AC |
4.11:1 |
| AY |
2.73:1 |
| AW |
3.08:1 |
| AX |
3.36:1 |
| LR |
3.36:1 |
1976-77
Rear Axle Ratios & Identification Codes
|
Code |
Ratio |
| OA |
3.08:1 |
| OD |
3.36:1 |
| LR |
3.36:1 |
| OB |
3.55:1 |
| OC |
3.70:1 |
1978
Rear Axle Ratios & Identification Codes
|
Code |
Ratio |
| OK |
3.08:1 |
| OM |
3.36:1 |
| OH |
3.55:1 |
| OJ |
3.70:1 |
1979
Rear Axle Ratios & Identification Codes
|
Code |
Ratio |
| OM |
3.36:1 |
| OH |
3.55:1 |
| OJ |
3.70:1 |
1980
Rear Axle Ratios & Identification Codes
|
Code |
Ratio |
| OF |
3.07:1 |
| OH |
3.07:1 |
1981
Rear Axle Ratios & Identification Codes
|
Code |
Ratio |
Equipment |
| OJ |
2.87:1 |
Automatic
Transmission |
| OK |
2.72:1 |
Manual Transmission |
1982
Rear Axle Ratios & Identification Codes
|
Code |
Ratio |
Equipment |
| OA |
2.72:1 |
Standard
Wheels |
| OF |
2.87:1 |
Aluminum
Wheels |
Note: All
1970-1982 Corvette rear axles were Positraction.
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