(Used) 1985 Mack RD686SX, FRONT DIFFERENTIAL HOUSING ONLY- Make: Mack, Model: CRDPC112, Ratio: 5.02, Capacity: 22,000 Lbs, Part Number: TBD, Serial Number: TBD, For more information about this item, give us a call.We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921