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Sonnax GM 4T80E Boost Valve Assembly 4T80-E Automatic Transmission
OPT Product Code: SNX-72754-01K$87.38
Product Details
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 now offers a replacement boost valve assembly 72754-01K that restores the hydraulic integrity and properly controlled line rise. The 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.
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