Grand Cherokee 4WD L6-242 4.0L VIN S MFI (1993)
Valve Body: Description and Operation
PURPOSE
The solenoids are mounted on the valve body and operated by the TCU. The solenoids control operation of the converter lockup and shift valves
in response to input signals from the TCU.
OPERATION
Valve Body Solenoid Cutaway
Three solenoids are used. The No. 1 and 2 solenoids control shift valve operation by applying or releasing line pressure as indicated by TCU
signal. The No. 3 solenoid controls operation of the converter lockup clutch in response to signals from the TCU.
when the No. 1 and 2 solenoids are activated, the solenoid plunger is moved off its seat opening the drain port to release line pressure. When either
solenoid is deactivated, the plunger closes the drain port.
The No. 3 solenoid operates in reverse. When the solenoid is deactivated, the solenoid plunger is moved off its seat opening the drain port to
release line pressure. When the solenoid is activated, the plunger closes the drain port.
