1985 FRONT AXLE IDENTIFICATION MODEL CODE RATIO HUB TYPE i K1 GPP 2 73 AUTO K1 GPR 2 73 MANUAL K1 GPS 3 08 AUTO K1 GPT 3 08 MANUAL K1 GRB 3 42 AUTO K1 GRD 3 42 MANUAL K1 GRP 3 73 AUTO K1 GRS 3 73 MANUAL K2 GPW 3 23 MANUAL K2 GPY 3 23 MANUAL K2 GPZ 3 42 AUTO K2 GRA 3 42 MANUAL V K2 GRF 3 42 MANUAL K2 GRG 3 73 AUTO K2 GRN 3 73 MANUAL K2 GRT 3 73 MANUAL K2 GRU 4 10 AUTO K2 V GRW 4 10 MANUAL K2 GRY 4 10 MANUAL MODEL CODE RATIO RR WHEELS SOURCE V K3 TBA 3 73 EXC DUAL DANA K3 TBB 3 73 W DUAL DANA K3 TCA 4 10 EXC DUAL DANA K3 TCB 4 10 W DUAL DANA K3 TDA 4 56 EXC DUAL DANA K3 TDB 4 55 W DUAL DANA t 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52R T i 38 REV 1 88