AXLE DE NTIFICAT ON CODES INDICATES POSITRACTION 1982 B 2 29 RATIO GH2 OPTION 2 41 RATIO GU1 OPTION 2 56 RATIO GM8 OPTION CODE RING GEAR CODE RING GEAR CODE RING GEAR GC 7 50 YC 8 75 YD 8 75 HC 7 50 UF 8 75 YU 8 75 YT 8 75 GA 7 50 UY 8 75 HA 7 50 WT 8 75 YR 8 75 ZC 8 75 TU 8 75 YL 8 75 YM 8 75 GF 7 50 HF 7 50 FA 7 50 FX 7 50 ZT 8 75 YO 8 75 TT 8 75 BLA 8 50 7LZ 8 50 2 73 RATIO GU2 OPTION 2 93 RATIO GU8 OPTION 3 08 RATIO GU4 OPTION CODE RING GEAR CODE RING GEAR CODE RING GEAR YE 8 75 GG 7 50 YJ 8 75 YW 8 75 HG 7 50 XJ 8 75 WW 8 75 FB 7 50 YY 8 75 ZF 8 75 YF 8 75 XY 8 75 YN 8 75 YG 8 75 WJ 8 75 FC 7 50 PY 8 75 WY 8 75 GB 7 50 YX 8 75 ZJ 8 75 HB 7 50 YP 8 75 ZY 8 75 FY 7 50 UP 8 75 TY 8 75 ZW 8 75 TX 8 75 GLE 8 50 YS 8 75 7LV 8 50 TW 8 75 7LX 8 50 ZE 8 75 3 23 RATIO GU5 OPTION CODE RING GEAR YK 8 75 YZ 8 75 WK 8 75 WZ 8 75 TK 8 75 TZ 8 75 6LF 8 75 7LU 8 50 T 1991 GENERAL MOTORS SERVICE PARTS OPEF1AT 0NS CHEVROLET 17W 6 91 5 3 5 000