(Used) 2001 Western Star 4900E, COMPLETE FRONT DIFFERENTIAL GEARS ONLY- Serial Number: AVA00204321, Part Number: 33061N3585G4.11, Make: Meritor/Rockwell, Model: RD20145NCN2252, Ratio: 4.11, 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