Toyota/Lexus vehicles with U140E, U140F, U240E and U241E transmissions may exhibit insufficient line rise in the drive ranges, excessively high pressures in Reverse and shift issues. This may be caused by continuous oscillation of the pressure regulator valve and boost valves causing severe wear. Sonnax oversized pressure regulator and boost valve kit 57917E-08K has upgraded materials to prevent wear and minimal clearances to restore proper hydraulic control. A new spring is included to work with the oversized valve and re-establish OE regulated pressure specifications Kit includes an increased ratio boost valve assembly specially designed to work with the oversized regulator valve
Pressure Regulator and Boost Valve Kit; Oversized; Requires Tool T-57917E-TL8
