(Used) 1989 Gmc C6000 Topkick, COMPLETE DIFFERENTIAL HOUSING ONLY- Part Number: S 303991, Serial Number: 93568 032, Make: Eaton, Model: 15040T, Ratio: 0.32, Capacity: 15,000 Lbs, Hub Bolts: 5, Brake Type: Disk, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921