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Home >> Chevrolet >> 2010 >> Cobalt LS, 4D Sedan, Automatic >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4T45-E - Description And Operation >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Overdrive Range, 4-3 Downshift - Torque Converter Clutch Not Applied (W/O Electronic Range Select Mode) >> Line Pressure Increases >> Pressure Regulator Valve

Pressure Regulator Valve

Increased torque signal fluid pressure acting on the boost valve increases line pressure at the pressure regulator valve.