; HomeHeavy Duty Truck PartsDifferentials & Differential PartsAxle Housings (Rear)Meritor/RockwellRD20-145Used 2007 ROCKWELL RD20145 Axle Housing (Rear) Used 2007 ROCKWELL RD20145 Axle Housing (Rear) Unfortunately this part is temporarily unavailable. View other Meritor/Rockwell RD20-145 Axle Housings (Rear)