2001 Spicer/Dana Other, Truck Delivery, Rear Rears (Tandem Rear or Single), Fits to: Peterbilt 378, (Used) 2001 Peterbilt 378, REAR DIFFERENTIAL GEARS ONLY- Make: Spicer, Model: DS463P, Ratio: 4.33, Capacity: 20,000 Lbs, Part Number: C05-15070183E00433, 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, Ratio 4.33, Serial# TBD, Truck Year 2001 1NPFLU0X21N564297