Passenger Car Rear Axle Identification
Axles are manufactured by Chevrolet Buffalo, Chevrolet Gear and Axle, Oldsmobile, Pontiac and GM of Canada (McKinnon). Divisional Manufacturer code letters will be metal stamped on the axle tube adjacent to the carrier for field identification (see example). Letters and numerals 1/4" high are metal stamped on right front inboard side, 3" outboard of carrier or are located on a metal tag attached to cover bolt.
FIELD IDENTIFICATION
6JH C 218 1
Manufacturer Day of 1 - For Day Shift
Axle Code Identity Year Built 2 - For Night Shift
MANUFACTURER IDENTITY
O - Oldsmobile
P - Pontiac
G - Chevrolet Gear and Axle
C - Chevrolet Buffalo
K - GM of Canada, St. Catherines (McKinnon)
1984 AXLE IDENTIFICATION CODES "F" SERIES
(*INDICATES POSITRACTION)
3.08 RATIO 3.23 RATIO 3.42 RATIO 3.73 RATIO
RING RING RING RING
CODE GEAR CODE GEAR CODE GEAR CODE GEAR
6ET 7.5 6JH 7.5 6JJ 7.5 6JK 7.5
6EU 7.5 *6JZ 7.5 6PJ 7.5 *6JQ 7.5
6ES 7.5 *6PZ 7.5 6PK 7.5
6EW 7.5 *6PQ 7.5
6EX 7.5 6KK 7.5
6EV 7.5 6EB 7.5
6EQ 7.5 6EC 7.5
6ER 7.5 6JM 7.5
6KM 7.5
6PM 7.5
1984 AXLE IDENTIFICATION CODES "T" SERIES
(*INDICATES POSITRACTION)
3.36 RATIO 3.62 RATIO
RING RING
CODE GEAR CODE GEAR
4TA 6.50 4TB 6.50
4TC 6.50 4TD 6.50
1984 AXLE IDENTIFICATION CODES "G" SERIES
(*INDICATES POSITRACTION)
2.29 RATIO 2.41 RATIO
RING RING
CODE GEAR CODE GEAR
2AH 7.50 2AJ 7.50
*2BH 7.50 *2BJ 7.50
6AT 7.50 6AZ 7.50
*6BT 7.50 *6BZ 7.50
2.73 RATIO 3.08 RATIO 3.42 RATIO 3.73 RATIO
RING RING RING RING
CODE GEAR CODE GEAR CODE GEAR CODE GEAR
2AB 7.50 2AC 7.50 6AS 7.50 6TF 8.50
*2BB 7.50 * 2BC 7.50 *6BS 7.50 * 6TR 8.50
6AX 7.50 6AV 7.50 6TE 8.50
*6BX 7.50 * 6BV 7.50 *6TP 8.50
6TJ 7.50
1984 AXLE IDENTIFICATION CODES "B" SERIES
(*INDICATES POSITRACTION)
2.41 RATIO 2.56 RATIO 2.73 RATIO 2.93 RATIO
RING RING RING RING
CODE GEAR CODE GEAR CODE GEAR CODE GEAR
8GF 7.50 4YF 8.50 8FC 7.50 8GG 7.50
8FA 7.50 *4YT 8.50 8GB 7.50 *4ZR 8.50
4ZN 8.50 *4ZQ 8.50 *4DW 8.50
4ZF 8.50 4ZD 8.50 4YC 8.50
4DU 8.50 *4ZU 8.50 *4YQ 8.50
*4DV 8.50 4YK 8.50
4YB 8.50 *4YX 8.50
*4YP 8.50
4YG 8.50
*4YU 8.50
3.08 RATIO 3.23 RATIO 3.73 RATIO
RING RING RING
CODE GEAR CODE GEAR CODE GEAR
4ZA 8.50 4ZB 8.50 6ZN 8.50
*4ZS 8.50 *4ZT 8.50 *6ZK 8.50
4ZE 8.50 4DH 8.50 6ZJ 8.50
*4ZV 8.50 *4DY 8.50 *6ZL 8.50
4DG 8.50 4YE 8.50
*4DX 8.50 *4YS 8.50
4YD 8.50 4YM 8.50
*4YR 8.50 *4YZ 8.50
4YL 8.50
*4YY 8.50