2013 Dana Other, Truck Delivery, Rear Rears (Tandem Rear or Single), Fits to: Peterbilt 337, (Used) 2013 Peterbilt 337, REAR REAR, Make: Spicer, Model: P20060, Ratio: 4.11, Spicer: HN04017829, Hub Bolts: 10, For more information about this item, gives us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON,MD 21921, Ratio 4.11, Axle Spline Count Other, Serial# HN04017829 2NP2HM6X4DM197821