1968 Chevelle Differential Codes

Rear Axle Code information is stamped on the axle housing for this year.. contains a 7 digit code that tells the stock ratio, month / day of build as well as the production facility, either W - Warren or B - Buffalo
Format is: CA0403B for a 3.08 rear ratio built on April 3rd at the Buffalo plant.

Rear Numerical Codes
Code	Positraction	Ratio
CA		3.08
CB		3.36
CC		3.73
CD	X	3.07
CE	X	3.08
CF	X	3.31
CG	X	3.36
CH	X	2.73
CI	X	3.73
CJ		3.08
CP		2.73
CR	X	3.70
CU	X	3.73
CU	X	3.73
CV		3.70
CW		3.31
CX		3.07
CX		2.73
CY		3.07
F1	X	2.73
FH		2.73
FK	X	3.08
FL		3.36
FM	X	3.36
FN		3.55
FO	X	3.55
FO	X	3.7
FP		3.70
K2		3.55
K3	X	3.55
K4		3.73
K5	X	3.73
K6	X	4.1
K7	X	4.56
K8	X	4.88
KA		3.55
KB	X	3.55
KC	X	2.73
KD		2.73
KF	X	3.55
KJ		3.55
KK	X	4.1
KM	X	4.56
KO	X	4.88
KW		2.73
KX	X	3.07
KY	X	3.31
KZ		3.31