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REAR AXLE IDENTIFICATION
The rear axle identification code consists of a
two letter prefix indicating the gear ratio, four digits indicating the
assembly date as month/day, and a single letter suffix indicating the manufacturing
location. The identification code should be stamped on the bottom
or front left or right axle tube either adjacent to the carrier housing
or about 8" - 10" inboard from the backing plates.
CN = 3.31 w/metallic brakes
0205 = February 5
B = Buffalo, N.Y. manufacturing location
| Prefix |
Axle Ratio |
| CA |
3.08 |
| CB |
3.36 |
| CC |
3.73 |
| CD |
307 ~ Positraction |
| CE |
3.08 ~ Positraction |
| CF |
3.31 ~ Positraction |
| CG |
3.36 ~ Positraction |
| CH |
3.70 ~ Positraction w/Metallic Brakes |
| CI |
3.73 ~ Positraction |
| CJ |
3.07 ~ Metallic Brakes |
| CK |
3.07 ~ Positraction w/Metallic Brakes |
| CL |
3.08 ~ Metallic Brakes |
| CM |
3.08 ~ Positraction w/Metallic Brakes |
| *CN |
*3.31 ~ Metallic Brakes |
| CO |
3.31 ~ Positraction w/Metallic Brakes |
| CP |
3.36 ~ Metallic Brakes |
| CQ |
3.36 ~ Positraction w/Metallic Brakes |
| CH |
3.70 ~ Metallic Brakes |
| CR |
3.70 ~ Positraction |
| CS |
3.70 ~ Positraction w/Metallic Brakes |
| CT |
3.73 ~ Metallic Brakes |
| CU |
3.73 ~ Positraction w/Metallic Brakes |
| CV |
3.70 ~ Overdrive |
| CW |
3.31 ~ "327" w/Air Conditioning |
| CX |
3.07 ~ "327" |
| GA |
3.31 ~ Heavy Duty |
| GB |
2.73 ~ 327 w/Powerglide |
| GC |
2.73 ~ Positraction |
| GD |
2.73 ~ Metallic Brakes |
| GE |
2.73 ~ Positraction w/Metallic Brakes
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| Assembly Month
- 1st and 2nd numbers |
| Number |
Month |
Number |
Month |
| 01 |
January |
*02 |
*February |
| 03 |
March |
04 |
April |
| 05 |
May |
06 |
June |
| 07 |
July |
08 |
August |
| 09 |
September |
10 |
October |
| 11 |
November |
12 |
December |
Assembly Day - 3rd and 4th numbers
01...31
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Rear Axle Assembly
Plant - 5th letter
|
| Code |
Assembly Plant |
| *B |
Buffalo, New York |
| G |
Chevrolet Gear & Axle |
| W |
Warren, Michigan |
| K |
McKinnon Industries |
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