TransGo Pressure Regulator and Clutch Apply Boost Valve Kit U140E/F / U240 / U241 1988+ | U140-BOOST

1998 and newer Toyota and Lexus vehicles equipped with the U140, U240 and U241 series automatic transmissions with high mileage often have worn out B1 switch boost valve and bushing as well as the main line pressure boost valve and bushing. The computer determines the appropriate line pressure value in accordance with the calculated load input. The ECM will then send the amount of current needed to the SLT solenoid to raise or lower the main line pressure in accordance to the driving conditions. Adequate main line pressure is required to provide enough clamping force under all load cond