; HomeHeavy Duty Truck PartsDifferentials & Differential PartsRear Rears (Tandem Rear or Single)Meritor/Rockwell20-145Used 2004 Meritor/Rockwell 20-145 Rear Rear (Tandem Rear or Single) Used 2004 Meritor/Rockwell 20-145 Rear Rear (Tandem Rear or Single) Unfortunately this part is temporarily unavailable. View other Meritor/Rockwell 20-145 Rear Rears (Tandem Rear or Single)