Grand Cherokee 4WD SRT-8 V8-6.1L VIN 3 (2006)
When the multiple-disc brake 131 (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
At the working pressure regulating valve surplus oil is diverted to the lubrication pressure regulating valve (1), from where the lubrication pressure
(p-Sm) is used in regulated amounts to supply the transmission lubrication system including the torque converter.
Shift Pressure Regulating Valve
The shift pressure is determined by the shift pressure regulating solenoid valve and the shift pressure regulating valve (1). In addition, pressure from
the clutch K2 is also present at the annular surface of the shift pressure regulating valve. This reduces the shift pressure in 2nd gear.
