January 21, 2013
Toyota/Lexus vehicles with U151E, U151F and U250E 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 27741-08K features upgraded materials and extremely tight tolerances to restore and maintain proper hydraulic control.
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
Either a Wet Air Test or a Vacuum Test in the location shown, result in leakage. Vacuum test must hold a minimum of 18.