2020 Meritor/Rockwell Other, Truck Tractor, Rear Rears (Tandem Rear or Single), Fits to: Western Star 4900EX, (Used) 2020 Western Star 4900EX, COMPLETE REAR DIFFERENTIAL GEARS ONLY- Make : Meritor/Rockwell, Model: MR2014X4DCRNN603, Serial Number: FOR05728253, Custom Number: C11-00043-786, Ratio: 3.90, 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 3.90, Serial# FOR05728253, Truck Year 2020 5KJJABD17LPLS6893