Line Pressure Hydraulic Circuits
Line pressure is controlled by the Line Pressure Control (LPC) solenoid, which is controlled by the PCM. This effects shift feel and apply component operation.
When the engine is running, the pump supplies pressure to the main pressure regulator valve, which is controlled by the LPC solenoid. The main pressure regulator valve controls the line pressure to the LINE circuit which supplies the manual valve solenoid regulator valve and the control pressure regulator valve.
When the manual valve is in the reverse position, it supplies the clutch control bypass valve with line pressure to position it to supply line pressure to the direct (3, 5, R) regulator valve and regulated line pressure to the low/reverse clutch to apply the clutch.
When the manual valve is in the DRIVE or LOW positions, it directs line pressure from the LINE circuit to the DRIVE circuit to supply line pressure to the:
- Clutch control bypass valve
- Forward (1, 2, 3, 4) regulator valve
- Intermediate (2, 6) regulator valve
- Torque Converter Clutch (TCC) regulator valve
- Direct (3, 5, R) clutch regulator valve