; HomeHeavy Duty Truck PartsDifferentials & Differential PartsRear Rears (Tandem Rear or Single)EatonRS404Used 2004 Eaton RS404 Rear Rear (Tandem Rear or Single) Used 2004 Eaton RS404 Rear Rear (Tandem Rear or Single) Unfortunately this part is temporarily unavailable. View other Eaton RS404 Rear Rears (Tandem Rear or Single)