(Used) 1990 GMC C7000, DIFFERENTIAL HOUSING ONLY- Part Number: 21065S, Make: Eaton, Model: 19050S, Ratio: 4.63, Capacity: 21,000 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