; HomeHeavy Duty Truck PartsDifferentials & Differential PartsDifferential CasesMeritor/RockwellRT40-145Used 1997 Meritor/Rockwell RT40/145 Differential Case Used 1997 Meritor/Rockwell RT40/145 Differential Case Unfortunately this part is temporarily unavailable. View other Meritor/Rockwell RT40-145 Differential Cases