2016 Meritor/Rockwell MT40-14X, Truck Tractor, Rear Rears (Tandem Rear or Single), Fits to: Western Star 4700, (Used) 2016 Western Star 4700, COMPLETE REAR DIFFERENTIAL GEARS ONLY- Serial Number: FOR03604900, Make: Meritor/Rockwell, Model: MT4014X, Hub Bolts: 10, Brake Type: Drum, Ratio: 3.42, Capacity: 20,000Lbs, 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 3.42, Serial# FOR03604900, Casting# FOR03604900 5KJJAXDVXGPHT9514