In GM 4T80-E units, the boost valve assembly is activated by torque signal pressure from the pressure control solenoid and Reverse pressure to aid in adjusting line pressure at the pressure regulator valve. This boost valve is continuously oscillating in the sleeve, which leads to wear and hydraulic leakage. When wear occurs, critical oil pressure is allowed to cross leak between the circuits or leak to exhaust. These leaks can result in either no line rise or an unwanted increase in line pressure. Sonnax boost valve kit 72754-01K restores hydraulic integrity and properly controls line rise.

Sleeve is manufactured from highly wear resistant aluminum, and the valve from anodized aluminum
Tight tolerances on the sleeve and valve maintain an ideal fit that prevents leakage
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

Sonnax Tcc Regulator Valve, Ford, 4R44E/4R55E, 5R44E/5R55E, Each

Sonnax Tcc Regulator Valve, Ford, 4R44E/4R55E, 5R44E/5R55E, Each

$29.02

COMP Cams Valve, Sportsman, Stainless Steel, Intake, GM LS7, 2.200 in. Head, 5.550 in. Length, Set of 8

COMP Cams Valve, Sportsman, Stainless Steel, Intake, GM LS7, 2.200 in. Head, 5.550 in. Length, Set of 8

$1,910.22

MANLEY Valve, Severe Duty, Intake, 2.3 in. Head Dia, 0.3415 in. Stem Dia, 5.494 in. Length, Each

MANLEY Valve, Severe Duty, Intake, 2.3 in. Head Dia, 0.3415 in. Stem Dia, 5.494 in. Length, Each

$79.73

MANLEY Valve, Titanium, Intake, Bead Loc, 2.3 in. Head Dia, 0.3415 in. Stem Dia, 5.5 in. Length, Set of 8

MANLEY Valve, Titanium, Intake, Bead Loc, 2.3 in. Head Dia, 0.3415 in. Stem Dia, 5.5 in. Length, Set of 8

$2,678.30

MANLEY Valve, Titanium, Intake, 2.25 in. Head Dia, 0.3415 in. Stem Dia, 5.25 in. Length, Set of 8

MANLEY Valve, Titanium, Intake, 2.25 in. Head Dia, 0.3415 in. Stem Dia, 5.25 in. Length, Set of 8

$2,678.30

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.14 in. Height, Set of 8

MANLEY Valve, Titanium, Exhaust, Bead Loc, 1.6 in. Head Dia, 0.3415 in. Stem Dia, 5.14 in. Height, Set of 8

$2,584.74