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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.
CW = 3.31:1
11218 = November 21
B = Buffalo, NY manufacturing location
| Prefix |
Axle Ratio |
| CA |
3.08 |
| CB |
3.36 |
| CC |
3.73 |
| CD |
3.07 ~ Positraction |
| CE |
3.08 ~ Positraction |
| CF |
3.31 ~ Positraction |
| CG |
3.36 ~ Positraction |
| CH |
2.73 ~ Positraction |
| CI |
3.73 ~ Positraction |
| CJ |
2.56 |
| CK |
2.56 ~ Positraction |
| CL |
2.56 |
| CM |
2.56 ~ Positraction |
| CN |
2.56 |
| CO |
2.56 ~ Positraction |
| CP |
2.73 |
| CQ |
2.56 |
| CS |
2.56 ~ Positraction |
| CT |
2.73 |
| *CW |
*3.31 |
| CX |
3.07 |
| CY |
3.07 |
| CZ |
2.73 |
| KA |
3.55 small ring gear |
| KB |
2.56 ~ Positraction, small ring gear |
| KC |
2.73 ~ Positraction, small ring gear |
| KD |
2.73 large ring gear |
| KE |
2.73 ~ Positraction, small ring gear |
| KF |
3.55 ~ Positraction, large ring gear |
| KG |
3.08 small ring gear |
| KH |
3.08 ~ Positraction, small ring gear |
| KI |
3.36 |
| KJ |
3.55 large ring gear |
| KK |
4.10 ~ Positraction |
| KL |
3.36 ~ Positraction, small ring gear |
| KM |
4.56 ~ Positraction |
| KN |
3.55 small ring gear |
| KO |
4.88 ~ Positraction |
| KP |
3.55 ~ Positraction, small ring gear |
| KQ |
4.10 ~ Positraction, heavy duty |
| KX |
3.07 ~ Positraction |
| FH |
2.73 |
| FI |
2.73 ~ Positraction |
| FJ |
3.08 |
| FK |
3.08 ~ Positraction |
| FL |
3.36 |
| FM |
3.36 ~ Positraction |
| FN |
3.55 |
| FO |
3.55 ~ Positraction |
| 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
|
Rear Axle
Assembly Plant - 5th letter
|
| Code |
Assembly Plant |
| *B |
*Buffalo, NY |
| G |
Chevrolet Gear & Axle |
| W |
Warren, MI |
| K |
McKinnon Industries |
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