; HomeHeavy Duty Truck PartsDifferentials & Differential PartsRear Rears (Tandem Rear or Single)Meritor/RockwellOtherUsed 2003 ROCKWELL RR-20145-NF Rear Rear (Tandem Rear or Single) Used 2003 ROCKWELL RR-20145-NF Rear Rear (Tandem Rear or Single) Unfortunately this part is temporarily unavailable. View other Meritor/Rockwell Other Rear Rears (Tandem Rear or Single)