2001 Spicer/Dana Other, Truck Delivery, Front Rears (Tandem Front), Fits to: Mack RD688S, (Used) 2001 Mack RD688S, COMPLETE FRONT DIFFERENTIAL GEARS ONLY- Serial Number: 20003945, Make: Spicer/Dana, Model: 190F-4429A, Hub Bolts: 10, Brake Type: Drum, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921, Ratio TBD, Serial# 20003945, Casting# 20003945 1M2P267C61M055778