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1964 Chevelle Axle Codes

1964 Axle codes can be found on the bottom, or left or right front axle tube next to the carrier housing. Additionally, codes can also be found approximately 8" to 10" inside of the backing plates.

Prefix	Gear Ratio
LA	3 or 4-speed (3.08)
LB	3 or 4-speed (3.36)
LG	Positraction (3.08)
LH	Positraction (3.36)
YA	3 or 4-speed (3.08)
YB	3 or 4-speed (3.36)
YG	Positraction (3.08)
YH	Positraction (3.36)
ZA	3 or 4-speed (3.08)
ZB	3 or 4-speed (3.36)
ZC	w/Metallic Brakes (3.08)
ZD	w/Metallic Brakes (3.36)
ZE	Posi w/Metallic Brakes (3.08)
ZF	Posi w/Metallic Brakes (3.36)
ZG	Positraction (3.08)
ZH	Positraction (3.36)
ZJ	w/Overdrive (3.70)
ZK	Positraction (3.70)
ZL	w/Metallic Brakes (3.70)
ZM	Posi w/Metallic Brakes (3.70)

64 Axle Codes

1964 Chevelle Axle Codes