2007 Spicer/Dana RSP40, Truck Tractor, Rear Rears (Tandem Rear or Single), Fits to: Peterbilt 379, (Used) 2007 Peterbilt 379, COMPLETE REAR DIFFERENTIAL GEARS ONLY- Part Number: C05-140601H4A00336, Serial Number: SHN02194912, Make: Spicer/Dana, Model: RSP40, Ratio: 3.36, Capacity: 19,000 Lbs, 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 3.36, Serial# SHN02194912, Casting# SHN02194912 1XP5DB9X67N637976