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. Note too that many Protect-O-Plate cards show only the second and third letter of the code and omit the leading "C" character where some may show all three letters such as CCW.

CW = 3.31:1 (Note on this Atlanta P-O-P the rear axle is coded with the two letter suffix CW.)
0121 = January 21
B = Buffalo, N.Y. manufacturing location

Prefix Axle Ratio
CGD 2.73:1 ~ Positraction
CCH 2.73:1 ~ Positraction
CCD 3.07:1 ~ Positraction
CCP 2.73:1
CCA 3.08:1
CGA 2.56:1
CGC 2.73:1
CGF 3.08:1
CGG 3.36:1
CGB 2.56:1 ~ Positraction
CGI 3.36:1 ~ Positraction
CCN 2.56:1
CKD 2.73:1
CCX 3.07:1
*CCW *3.31:1
CKJ 3.55:1
CCO 2.56:1 ~ Positraction
CCF 3.31:1 ~ Positraction
CKF 3.55:1 ~ Positraction
CKK 4.10:1
CKC 2.73:1 ~ Positraction
CCE 3.08:1 ~ Positraction
CRJ 2.56:1
CRK 2.56:1 ~ Positraction
CRU 3.31:1
CRV 3.31:1 ~ Positraction
CRW 4.10:1
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