2007 Dana DSP40, Truck Tractor, Rear Rears (Tandem Rear or Single), Fits to: Kenworth T800, (Used) 2007 Kenworth T800, REAR DIFFERENTIAL GEARS ONLY- Part Number: 511329, Make: Spicer, Model: DSP40, Ratio: 3.55, Capacity: 19,000 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 3.55, Serial# TBD, Truck Year 2007 1XKDDU9X47J163675