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

More From This Category

MANLEY Valve, Race Master, Exhaust, 1.88 in. Head Dia, 0.3415 in. Stem Dia, 5.17 in. Length, For Ford BB, Set of 8

MANLEY Valve, Race Master, Exhaust, 1.88 in. Head Dia, 0.3415 in. Stem Dia, 5.17 in. Length, For Ford BB, Set of 8

$380.66

MANLEY Valve, Race Master, Exhaust, 1.9 in. Head Dia, 0.3715 in. Stem Dia, 5.422 in. Length, BBC, Set of 8

MANLEY Valve, Race Master, Exhaust, 1.9 in. Head Dia, 0.3715 in. Stem Dia, 5.422 in. Length, BBC, Set of 8

$380.66

MILODON Valve, Intake, Race, Stainless Steel, 2.08 in. Diameter, For Chevrolet, Small Block, 350, 383, 400, Each

MILODON Valve, Intake, Race, Stainless Steel, 2.08 in. Diameter, For Chevrolet, Small Block, 350, 383, 400, Each

$72.00

MANLEY Valve, Extreme Duty, Exhaust, 1.3 in. Head Dia, 0.2735 in. Stem Dia, 4.985 in. Length, Duramax Diesel, Set of 8

MANLEY Valve, Extreme Duty, Exhaust, 1.3 in. Head Dia, 0.2735 in. Stem Dia, 4.985 in. Length, Duramax Diesel, Set of 8

$1,037.08

MANLEY Valve, Race Master, Exhaust, 37.0mm Head Dia, 0.274 in. Stem Dia, 4.65 Length, For Ford, Set of 8

MANLEY Valve, Race Master, Exhaust, 37.0mm Head Dia, 0.274 in. Stem Dia, 4.65 Length, For Ford, Set of 8

$408.60