2012 Dana RSP40, Truck Tractor, Axle Housings (Rear), Fits to: Peterbilt 587, (Used) 2012 Peterbilt 587, COMPLETE REAR DIFFERENTIAL HOUSING ONLY- Serial Number: HN03654597, Part Number: 511328, Make: Spicer/Dana, Model: RSP40, Capacity: 20,000Lbs, Ratio: 5.36, Hub Bolts: 10, Brake Type: Disk, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921, Serial# HN03654597, Casting# HN03654597, Hub Bolts 10 1XP4D49X1CD135304