4 0 Eaton RST40 Rear Differential $600 USD Good used Eaton RST40 rear, rear differential assembly. 3.25 ratio 90 day guarentee for swap or refund ConditionUsedRear End3.25 ratioFits To Make(s)EATONFits To Model(s)RST40Stock NumberRyd RST40/3.25/41 MLS Number12518092CategoryDifferentials, Rear Last Updated7/30/2025 LocationFitchburg, MA, US Sold ByRydemore Heavy Duty Truck Parts (888) 519-___ SHOWNUMBERCall Seller Email Seller Save More Info