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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 190 (Nag1 Automatic Transmission (Service Information)) >> Unit, ELECTROHYDRAULIC Control >> Operation >> Operation >> Hydraulic Control Unit >> Shift Pressure Shift Valve

Shift Pressure Shift Valve

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Shift Pressure Shift Valve Components
GC0081228Courtesy of CHRYSLER GROUP, LLC
1 - 1-2/4-5 COMMAND VALVE
2 - DRIVING CLUTCH K1
3 - HOLDING CLUTCH B1
4 - 1-2/4-5 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) (Fig 1) 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.