2017 Dana RSP40, Truck Tractor, Axle Housings (Rear), Fits to: Peterbilt 579, (Used) 2017 Peterbilt 579, REAR DIFFERENTIAL HOUSING ONLY- Part Number: C2-1A13FA3000000001, Serial Number: HN05045034, Make: Spicer, Model: RSP40, Ratio: 3.36, 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, Serial# HN05045034, Casting# HN05045034, Hub Bolts 10 1XPBDP9X2HD420738