2001 Eaton DS463, Truck Delivery, Rear Rears (Tandem Rear or Single), Fits to: Peterbilt 378, (Used) 2001 Peterbilt 378, COMPLETE REAR DIFFERENTIAL GEARS ONLY- Make: Eaton, Model: DS463, Ratio: 3.90, Capacity: 20,000 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, Ratio 3.90, Serial# TBD, Truck Year 2001 1NPFL00X71N554048