AXLE IDENITIIFICATION CODES CONT D INDICATES POSITRACTION 198 1 B 2 73 RATIO GU2 OPTION 2 93 RATIO GU3 OPTION 3 08 RATIO GU4 OPTION CODE RING GEAR CODE RING GEAR CODE RING GEAR 4ZD 8 50 4YC 8 50 42E 8 50 42U 8 50 4YO 8 50 420 8 50 4Y8 8 50 4YK 8 50 4YD 8 50 4YG 8 50 4YX 8 50 4YR 8 50 4YP 8 50 8GG 7 50 425 8 50 4YU 8 50 4ZR 8 50 42A 8 50 4DV 8 50 BEC 7 50 420 8 50 8GB 7 50 2 41 RATIO GU1 OPTION 3 23 RATIO GU5 OPTION CODE RING GEAR CODE RING GEAR 4DU 8 50 42T 8 50 4ZN 8 50 428 8 50 8FA 7 50 8GF 7 50 42F 8 50 G 2 29 RATIO GH2 OPTION 2 41 RATIO GU1 OPTION 2 73 RATIO GU2 OPTION CODE RING GEAR CODE RING GEAR CODE RING GEAR 2AH 7 50 2AJ 7 50 2AB 7 50 28H 7 50 2BJ 7 50 288 7 50 6AT 7 50 6AZ 7 50 6AX 7 50 68T 7 50 682 7 50 68X 7 50 2 93 RATIO GU3 OPTION 3 08 RATIO GU4 OPTION 3 23 RATIO GU5 OPTION CODE RING GEAR CODE RING GEAR CODE RING GEAR 2AC 7 50 280 7 50 6AV 7 50 68V 7 50 3 42 RATIO GU6 OPTION 3 73 RATIO GT4 OPTION CODE RING GEAR CODE RING GEAR 6AS 7 50 6AF 7 50 685 7 50 T 3 36 RATIO GV4 OPTION 3 62 RATIO G75 OPTION CODE RING GEAR CODE RING GEAR 4TA 6 50 4T8 6 50 4TC 6 50 4TD 6 50 j 1991 GENERAL MOTORS SERVICE PARTS 0PERA TIONS CHEVROLET 17W 6 91 5 9 5 000