Vehicles with Toyota/Lexus U660E, U660F transmissions may exhibit insufficient line rise in Reverse, delayed Reverse engagement and/or a burned B2 brake. These problems may be caused by continuous oscillation of the steel boost valve within the cast aluminum boost sleeve, creating excessive wear and a path for line pressure to either leak to exhaust or leak to the EPC boost circuit and create high line pressure conditions.
Sonnax Reverse boost valve kit 47740-17K has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control.

Sleeve is manufactured from highly wear-resistant billet aluminum to prevent excess wear
Restores proper line rise
Hardcoat anodized aluminum valve combats premature wear
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

MANLEY Valve, Intake, Bead Loc, 2.4 in. Head Dia, 0.3415 in. Stem Dia, 6.4 in. Length, Each

MANLEY Valve, Intake, Bead Loc, 2.4 in. Head Dia, 0.3415 in. Stem Dia, 6.4 in. Length, Each

$408.10

MANLEY Valve, Race Master, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 4.965 in. Length, For Chevrolet SB, Set of 8

MANLEY Valve, Race Master, Exhaust, 1.625 in. Head Dia, 0.3415 in. Stem Dia, 4.965 in. Length, For Chevrolet SB, Set of 8

$380.66

MANLEY Valve, Severe Duty, Exhaust, 1.88 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, BBC, Set of 8

MANLEY Valve, Severe Duty, Exhaust, 1.88 in. Head Dia, 0.3415 in. Stem Dia, 5.522 in. Length, BBC, Set of 8

$607.34

MANLEY Valve, Extreme Duty, Exhaust, 1.654 in. Head Dia, 0.3136 in. Stem Dia, 5.75 in. Length, Gen II, Each

MANLEY Valve, Extreme Duty, Exhaust, 1.654 in. Head Dia, 0.3136 in. Stem Dia, 5.75 in. Length, Gen II, Each

$139.15

MANLEY Valve, Titanium, Intake, Bead Loc, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Height, Each

MANLEY Valve, Titanium, Intake, Bead Loc, 2.15 in. Head Dia, 0.3415 in. Stem Dia, 5.44 in. Height, Each

$302.72

MANLEY Valve, Titanium, Intake, 2.125 in. Head Dia, 0.3415 in. Stem Dia, 5.34 in. Height, Each

MANLEY Valve, Titanium, Intake, 2.125 in. Head Dia, 0.3415 in. Stem Dia, 5.34 in. Height, Each

$302.72