Circuit/System Description

Shift solenoid valve 1 is part of the control solenoid valve assembly, which has no serviceable components. The solenoid operates by the transmission control module (TCM) turning the low side driver ON or OFF. When the shift solenoid valve 1 is commanded OFF, the plunger forces the metering ball against the actuator feed limit seat, blocking the flow and any existing pressure is exhausted through the exhaust port. When the shift solenoid valve 1 is commanded ON, the internal plunger moves, allowing the metering valve to move away from the actuator feed limit seat and against the exhaust seat, creating signal fluid pressure. The signal fluid pressure acts against the clutch select Valve 2 to overcome the valve spring force, moving the valve to the apply position. Fluid pressure from the R-1/4-5-6 regulator valve flows through clutch select Valve 2 and is directed to either the low and reverse clutch or the 4-5-6 clutch, depending on the position of clutch select Valve 2.