2003 Meritor/Rockwell Other, Truck Delivery, Front Rears (Tandem Front), Fits to: Western Star 4900 FA, (Used) 2003 Western Star 4900 FA, COMPLETE FRONT DIFFERENTIAL GEARS ONLY- Make: Meritor/Rockwell, Model: B 3121W2025, Serial Number: KNH02032011, Part Number: 33063N3536A4.56, Ratio: 4.56, Hub Bolts: 10, Brake Type: Drum, 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 4.56, Serial# KNH02032011, Truck Year 2003 5KKMAEAV73PL86609