2007 Dana 21060S, Truck Delivery, Rear Rears (Tandem Rear or Single), Fits to: Chevrolet C8500, (Used) 2007 Chevrolet C8500, DIFFERENTIAL GEARS ONLY- Make: Spicer, Model: 21060S, Ratio: 6.50, Capacity: 21,000 Lbs, Part Number: 511226, Serial Number: HN02437934, 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 6.50, Serial# HN02437934, Truck Year 2007 1GBM8E1C07F401981