(Used) 2007 Freightliner ST120, REAR DIFFERENTIAL HOUSING ONLY- Make: Alliance, Model: RT40-4N, Ratio: 3.42, Capacity: 20,000 Lbs, Part Number: C11-00006-183, Serial Number: 771AAC-A047834T, For more information about this item, give us a call.We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921