1988 FRONT AXLE IDENTIFICATION f A MODEL CODE RATIO HUB TYPE V1 ZDM 2 73 AUTO V1 ZDN 2 73 MANUAL V1 ZDP 3 08 I AUTO V1 ZDR 3 08 MANUAL V1 ZDU 3 42 AUTO V1 ZDW 3 42 MANUAL V1 ZDZ 3 73 AUTO V1 ZFM 3 73 MANUAL V2 ZDS 3 42 AUTO V2 ZDT 3 42 MANUAL V2 ZDX 3 73 AUTO V2 ZDY 3 73 MANUAL V2 ZFN 4 10 AUTO V2 ZFP 4 10 MANUAL MODEL CODE RATIO RR WHEELS SOURCE V3 ZFR 3 73 EXC DUAL DANA V3 ZFS 3 73 W DUAL DANA V3 ZFT 4 10 EXC DUAL DANA V3 ZFU 4 10 W DUAL DANA V3 ZFW 4 56 EXC DUAL DANA V3 ZFX 4 56 W DUAL XDANA r A V l 1988 GENERAL MOTORS SERVICE PARTS OPERATIONS LT TRUCK 52R t REV 1 88 41 A