(Used) 1991 GMC C7000 Topkick, DIFFERENTIAL HOUSING ONLY- Part Number: 15624869, Serial Number: H911442728, Make: Eaton, Model: 22065S, Ratio: 4.63, Capacity: 23,000 lbs, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921