Hydraulic Operation

Line pressure hydraulic circuits:

• Line pressure from the pump is supplied to the manual valve.
• Line pressure is regulated by the pressure regulator valve.
• The pressure regulator valve is controlled by varying pressure from the LPC  solenoid through the LPC  circuit.

Torque converter circuits:

• Regulated line pressure from the pressure regulator valve is directed to the TCC  control valve through the CONV FD hydraulic circuit.
• When the TCC  is released, CONV FD pressure is directed to the TCC  RELEASE circuit by the TCC  control valve. Pressure from the TCC  RELEASE circuit releases the TCC  .
• Transmission fluid from the TCC  RELEASE returns to the TCC  control valve through the TCC  APPLY circuit.

Cooler and lubrication hydraulic circuits:

• The TCC  control valve directs transmission fluid from the TCC  APPLY circuit (return circuit from the torque converter when the TCC  is released) to the COOLER FEED circuit.
• In the COOLER FEED circuit, transmission fluid flows through the transmission fluid cooler or the thermal bypass valve to the LUBE circuit.

Solenoid hydraulic circuits:

• The LPC  solenoid applies varying pressure to the pressure control valve through the LPC  hydraulic circuit. The LPC  solenoid regulates line pressure by controlling the position of the pressure regulator valve.
• SSA  applies pressure to the forward (1, 2, 3, 4) clutch regulator valve to apply the forward clutch.
• SSC  applies pressure to the intermediate (2, 6) clutch regulator valve to apply the intermediate clutch.

Clutch hydraulic circuits:

• Line pressure from the manual valve is directed to the multiplex shift valve through the DRIVE 1 hydraulic circuit.
• The multiplex shift valve directs DRIVE 1 pressure to the forward (1, 2, 3, 4) clutch and the intermediate (2, 6) clutch regulator valves through the DRIVE 2 and CB26FD/CB1234FD hydraulic circuits. The CB26FD/CB1234FD circuit feeds the CB1234 SUP hydraulic circuit which feeds the forward (1, 2, 3, 4) clutch regulator valve.
• The low/reverse/overdrive (4, 5, 6) clutch regulator valve directs DRIVE 2 pressure to the multiplex shift valve through the VALVE LATCH hydraulic circuit to latch the multiplex shift valve.
• Regulated DRIVE 2 pressure from the forward (1, 2, 3, 4) clutch regulator valve is directed to the forward (1, 2, 3, 4) clutch through the CB1234 hydraulic circuit to apply the clutch.
• Regulated CB26FD/CB1234FD pressure from the intermediate (2, 6) clutch regulator valve is directed to the intermediate (2, 6) clutch through the CB26 hydraulic circuit to apply the clutch. The CB26 hydraulic circuit also supplies pressure to the opposite side of the CB26 clutch regulator valve for gradual intermediate (2, 6) clutch engagement.

For additional hydraulic circuit and information, refer to HYDRAULIC CIRCUITS .