2005 Meritor/Rockwell RT40-145, Truck Tractor, Rear Rears (Tandem Rear or Single), Fits to: Freightliner Columbia 120, (Used) 2005 Freightliner Columbia 120, COMPLETE REAR DIFFERENTIAL GEARS ONLY- Part Number: S11-15793-342, Serial Number: DRA04062137, Make: Meritor, Model: RT40-145, Ratio: 3.42, Capacity: 20,000 Lbs, 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# DRA04062137, Casting# DRA04062137 1FUJA6AVX5DN71499