Grand Cherokee 2WD V8-5.7L VIN 2 (2005)
The holding pressure shift valve (1) is actuated by the pressures present at the end face in the actuators and a spring. It assigns the working pressure
(p-A) to the actuator with the higher pressure (taking into account the spring force and the effective surface area). The other element of the shift group
is then unpressurized. The valve switches over only during the shift phase and only at a certain pressure ratio between the overlap pressure (p-U) and
the shift pressure (p-S).
Shift Pressure Shift Valve
When the multiple-disc brake B1 (3) is activated, the working pressure (p-A) is applied to the end face of the 1-2 / 4-5 shift pressure shift valve (4) via
the command valve (1). Its shift state is maintained during the shift phase by substituting the shift element pressure acting on its end face (and which is
variable during the shift phase) with a corresponding constant pressure. When the multi-plate clutch K1 (2) is activated, the end face of the shift valve
is unpressurized during the stationary and shift phases, so the shift state is maintained during the shift phase in this case too.
Lubrication Pressure Regulating Valve