1997 Meritor/Rockwell RS 21-145, Truck Delivery, Axles, Complete Rears, Fits to: Ford F800, (Used) 1997 Ford F800, COMPLETE REAR DIFFERENTIAL- Serial Number: AVA96115474, Make: Meritor, Model: RS21-145, Ratio: 4.33, Capacity: 21,000 Lbs, Hub Bolts: 10, Brake Type: Drum, 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 4.33, Serial# AVA96115474, Casting# AVA96115474 1FDXF80E6VVA18791