1967 El Camino 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 font of right axle tube either adjacent to the carrier housing or about 8" - 10" inboard from the backing plates.
Example: CB1012W decodes to CB ~ 3.36, 1025 ~ Month [Oct] and Day [12], W ~ Warren (B=Buffalo, G=Chevrolet Gear & Axle, K=McKinnon Industries). See bottom of page for examples.
Casting Numbers:
12-Bolt Casting #N3894939 (narrow early model year),
#NF3917124 (wide late model year)*
10-Bolt Casting #3894938N
* (Note: For what it's worth, ALL 67 rear ends I've ever seen were the narrow variety and used the spring cup like 68-72 but were narrower like the 64-66. I do have photos of a June 1967 cast #3917124 rear end but the assembly date is October - obviously for a 1968 model year Chevelle. However, a June 1967 casting date rear end such as this might have found its way into very late 1967 model year Chevelles as well and could be the basis for the statement in an article from Car Craft magazine some years ago titled "Inside 64-72 A-Bodies".)
The casting numbers/letters on rear end housings may have either a prefix or suffix of "N" or "NF" and no reason has been found yet why they may have one or the other.
| 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 | 3.07 ~ w/Metallic Brakes |
| CK | 3.07 ~ Positraction w/Metallic Brakes |
| CL | 2.73 ~ Positraction |
| CM | 2.73 ~ Positraction w/Metallic Brakes |
| CN | 3.31 ~ w/Metallic Brakes |
| CO | 3.31 ~ Positraction w/Metallic Brakes |
| CR | 3.73 ~ Positraction |
| CS | 2.56 ~ w/Metallic Brakes |
| CT | 3.73 ~ w/Metallic Brakes |
| CU | 3.73 ~ Positraction w/Metallic Brakes |
| CV | 3.70 |
| CW | 3.31 |
| CX | 3.07 |
| CY | 3.07 |
| CZ | 2.73 |
| KA | 3.55 |
| KB | 3.55 ~ Positraction |
| KC | 2.73 ~ Positraction |
| KD | 2.73 |
| KE | 2.56 ~ Positraction |
| KF | 3.55 ~ Positraction |
| KG | 3.55 ~ Positraction w/Metallic Brakes |
| KH | 3.55 ~ w/Metallic Brakes |
| KI | 2.56 ~ Positraction w/Metallic Brakes |
| KJ | 3.55 |
| KK | 4.10 ~ Positraction |
| KL | 4.10 ~ w/Metallic Brakes |
| KM | 4.56 ~ Positraction |
| KN | 4.56 ~ w/Metallic Brakes |
| KO | 4.88 ~ Positraction |
| KP | 4.88 ~ w/Metallic Brakes |
| KQ | 2.73 ~ w/Metallic Brakes |
| KR | 2.73 ~ Positraction w/Metallic Brakes |
| KS | 3.07 ~ w/Metallic Brakes |
| KT | 3.07 ~ Positraction w/Metallic Brakes |
| KU | 3.31 ~ w/Metallic Brakes |
| KV | 3.31 ~ Positraction |
| KW | 2.73 ~ Positraction |
| KX | 3.07 ~ Positraction |
| KY | 3.31 |
| KZ | 3.31 |
| 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 |
CB ~ 3.36, October 12, Warren
KO ~ 4.88, September 28, 1966 - Courtesy Jeff Helms
Want more information on 1967 Chevelles/El Caminos? Take a test drive
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Camino Reference CD.
