ATS modifies and upgrades the 68-RFE pump to allow pressures up to 300+ psi. The factory pump uses the cast aluminum to serve as the high pressure pump gear support bushing, the reality is using the aluminum as a bushing at pressures above stock (160 PSI) is unreliable and the pump gear and housing fails prematurely. The HD ATS pump is redesigned to withstand increased pressures over stock in excess of 300+PSI by installing a high pressure bushing material for the pump gear to ride in. These modifications not only ensure reliability but they also allow the pump to build more pressure across the RPM range be reducing hydraulic leaks. The Pressure regulator valve assembly and Lock up valve assembly is also reworked to promote proper function and durability.