1953
- 1967 Corvette Specification Guide
(1953-67
Rear Axle Ratios & Identification)
1953
Rear
Axle Ratios & Identification
|
Code |
Ratio |
Type |
Application |
| LW |
3.55:1 |
Standard |
Early |
| MW |
3.55:1 |
Standard |
Late |
1954
Rear
Axle Ratios & Identification
|
Code |
Ratio |
Type |
Application |
| MW |
3.55:1 |
Standard |
All |
1955
Rear
Axle Ratios & Identification
|
Code |
Ratio |
Type |
Application |
| AE |
3.55:1 |
Standard |
Powerglide |
| AH |
3.55:1 |
Standard |
3-Speed |
| AD |
3.27:1* |
Standard |
3-Speed |
*May
not have been used on the 1955 Corvette.
1956
Rear
Axle Ratios & Identification
|
Code |
Ratio |
Type |
Application |
| AE |
3.55:1 |
Standard |
Powerglide |
| AH |
3.70:1 |
Standard |
3-Speed |
| AD |
3.27:1 |
Standard |
3-Speed |
| AJ |
4.11:1 |
Standard |
3-Speed |
Note:
A very few 1956 Corvettes used Positraction rear axles stamped "3.70.1
HT" or "4.56.1 HT" indicating gear ratio and Hi-Tork.
1957-1958
Rear
Axle Ratios & Identification
|
Code |
Ratio |
Type |
Application |
| AE |
3.36:1 |
Standard |
Powerglide |
| AH |
3.70:1 |
Standard |
Manual Transmission |
| AN |
3.70:1 |
Positraction |
Manual Transmission |
| AP |
4.11:1 |
Positraction |
Manual Transmission |
| AQ |
4.56:1 |
Positraction |
Manual Transmission |
| AS |
3.70:1 |
Positraction |
Manual Trans. & H.D. Brakes & Suspension |
| AT |
4.11:1 |
Positraction |
Manual Trans. & H.D. Brakes & Suspension |
| AU |
4.56:1 |
Positraction |
Manual Trans. & H.D. Brakes & Suspension |
1959-1960
Rear
Axle Ratios & Identification
|
Code |
Ratio |
Type |
Application |
| AE |
3.55:1 |
Standard |
Powerglide |
| AH |
3.70:1 |
Standard |
Manual Transmission |
| AN |
3.70:1 |
Positraction |
Manual Transmission |
| AP |
4.11:1 |
Positraction |
Manual Transmission |
| AQ |
4.56:1 |
Positraction |
Manual Transmission |
| AS |
3.70:1 |
Positraction |
Manual Trans. & H.D. Brakes & Suspension |
| AT |
4.11:1 |
Positraction |
Manual Trans. & H.D. Brakes & Suspension |
| AU |
4.56:1 |
Positraction |
Manual Trans. & H.D. Brakes & Suspension |
| FJ |
3.70:1 |
Standard |
Manual
Trans. & Mettalic Brakes |
| FK |
3.70:1 |
Positraction |
Manual
Trans. & Mettalic Brakes |
| FL |
4.11:1 |
Positraction |
Manual
Trans. & Mettalic Brakes |
| FM |
4.56:1 |
Positraction |
Manual
Trans. & Mettalic Brakes |
1961
Rear
Axle Ratios & Identification
|
Code |
Ratio |
Type |
Application |
| AC |
3.36:1 |
Standard |
3-Speed |
| AE |
3.55:1 |
Standard |
Powerglide |
| AH |
3.70:1 |
Standard |
4-Speed |
| AN |
3.70:1 |
Positraction |
Manual Transmission |
| AP |
4.11:1 |
Positraction |
Manual Transmission |
| AQ |
4.56:1 |
Positraction |
Manual Transmission |
| AF |
3.36:1 |
Positraction |
Manual Transmission |
| AS |
3.70:1 |
Positraction |
4-Speed & H.D. Brakes & Suspension |
| AT |
4.11:1 |
Positraction |
Manual Trans. & H.D. Brakes & Suspension |
| AU |
4.56:1 |
Positraction |
Manual Trans. & H.D. Brakes & Suspension |
| FJ |
3.70:1 |
Standard |
4-Speed & Metallic Brakes |
| FK |
3.70:1 |
Positraction |
4-Speed & Metallic Brakes |
| FL |
4.11:1 |
Positraction |
Manual Trans. & Metallic Brakes |
| FM |
4.56:1 |
Positraction |
Manual Trans. & Metallic Brakes |
1962
Rear
Axle Ratios & Identification
|
Code |
Ratio |
Type |
Application |
| CA |
3.36:1 |
Standard |
Manual Transmission or Powerglide |
| CB |
3.36:1 |
Positraction |
Manual Transmission or Powerglide |
| CC |
3.55:1 |
Positraction |
4-Speed |
| CD |
3.70:1 |
Positraction |
4-Speed |
| CE |
4.11:1 |
Positraction |
4-Speed |
| CF |
4.56:1 |
Positraction |
4-Speed |
| CG |
3.70:1 |
Standard |
4-Speed |
| CX* |
3.70:1 |
Standard |
Close-Ratio 4-Speed |
| CH |
3.36:1 |
Standard |
Manual Trans. & Metallic Brakes |
| CY |
3.70:1 |
Standard |
4-Speed & Metallic Brakes |
| CK |
3.36:1 |
Positraction |
4-Speed & Metallic Brakes |
| CL |
3.55:1 |
Positraction |
4-Speed & Metallic Brakes |
| CM |
3.70:1 |
Positraction |
4-Speed & Metallic Brakes |
| CN |
4.11:1 |
Positraction |
4-Speed & Metallic Brakes |
| CP |
4.56:1 |
Positraction |
4-Speed & Metallic Brakes |
| CQ |
3.70:1 |
Positraction |
4-Speed & H.D. Brakes & Suspension |
| CR |
4.11:1 |
Positraction |
4-Speed & H.D. Brakes & Suspension |
| CS |
4.56:1 |
Positraction |
4-Speed & H.D. Brakes & Suspension |
| CT |
3.08:1 |
Standard |
4-Speed |
| CU |
3.08:1 |
Positraction |
4-Speed |
| CV |
3.08:1 |
Standard |
4-Speed & Metallic Brakes |
| CW |
3.08:1 |
Positraction |
4-Speed & Metallic Brakes |
*
1962 "CX" code unverified
1963-1964
Rear
Axle Ratios & Identification
|
Code |
Ratio |
Type |
Application |
| CA |
3.36:1 |
Standard |
Manual Transmission or Powerglide |
| CB |
3.36:1 |
Positraction |
Manual Transmission or Powerglide |
| CC |
3.55:1 |
Positraction |
4-Speed |
| CD |
3.70:1 |
Positraction |
4-Speed |
| CE |
4.11:1 |
Positraction |
4-Speed |
| CF |
4.56:1 |
Positraction |
4-Speed |
| CJ |
3.08:1 |
Positraction |
4-Speed |
| CX |
3.70:1 |
Standard |
Close-Ratio 4-Speed |
| CZ |
3.08:1 |
Standard |
Wide-Ratio 4-Speed |
1965-1967
Rear
Axle Ratios & Identification
|
Code |
Ratio |
Type |
Application |
| AK |
3.36:1 |
Standard |
Manual Transmission or Powerglide (327) |
| AL |
3.08:1 |
Positraction |
4-Speed (327) |
| AM |
3.36:1 |
Positraction |
Manual Transmission (327) |
| AN |
3.55:1 |
Positraction |
4-Speed (327) |
| AO |
3.70:1 |
Positraction |
4-Speed (327) |
| AP |
4.11:1 |
Positraction |
4-Speed (327) |
| AQ* |
4.56:1 |
Positraction |
4-Speed (327) |
| AR* |
3.08:1 |
Standard |
Wide-Ratio 4-Speed (327) |
| AS |
3.70:1 |
Standard |
Close-Ratio 4-Speed (327) |
| AT |
3.08:1 |
Positraction |
4-Speed (396/427) |
| AU |
3.36:1 |
Positraction |
4-Speed (396/427) |
| AZ |
3.55:1 |
Positraction |
4-Speed (396/427) |
| FA |
3.70:1 |
Positraction |
4-Speed (396/427) |
| FB |
4.11:1 |
Positraction |
4-Speed (396/427) |
| FC |
4.56:1 |
Positraction |
4-Speed (396/427) |
Note:
All 1965-67 Corvette rear axles were manufactured at Warren and
are suffixed "W". (*) Listed 1967 "AQ"
and "AR" codes & ratios may only have been used early
in the 1967 model-year, or not at all.
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