Shop used and remanufactured Eaton RS404 Rear Differentials on MyLittleSalesman.com . Compare active listings with prices from $200 to $2,602. Sellers include Boots and Hank's Truck Parts, Vander Haag's, and Tim Jordan's Truck Parts. Filter by condition, price, or year to find the Eaton RS404 Rear Differential that fits your job.