1-2-3-4 Clutch Releases

1-2-3-4 Pressure Control Solenoid 5 

The 1-2-3-4 pressure control Solenoid 5 is commanded OFF, allowing PCS 1-2-3-4 clutch fluid from the 1-2-3-4 clutch regulator valve and 1-2-3-4 clutch boost valve to exhaust.

1-2-3-4 Clutch Regulator Valve 

The 1-2-3-4 clutch regulator valve spring force moves the valve to allow 1-2-3-4 clutch feed fluid from the 1-2-3-4 clutch to pass through the valve and enter the exhaust backfill fluid circuit. The 1-2-3-4 clutch fluid the enters the exhaust backfill fluid circuit and is routed through orifice #26 where excess pressure is exhausted. Also, 1-2-3-4 clutch regulator valve spring force moves the valve to allow 1-2-3-4 clutch feed fluid to pass through the valve and enter the PS1 fluid circuit. PS1 fluid is then routed to pressure Switch 1 and opens the normally-closed switch.

1-2-3-4 Clutch Boost Valve 

The 1-2-3-4 clutch boost valve spring force moves the valve to allow 1-2-3-4 clutch feedback fluid from the 1-2-3-4 clutch regulator valve to enter the 1-2-3-4 clutch circuit and exhaust.

1-2-3-4 Clutch 

The 1-2-3-4 clutch spring force moves the 1-2-3-4 clutch piston to release the clutch plates and force 1-2-3-4 clutch fluid from the 1-2-3-4 clutch. The 1-2-3-4 clutch fluid is routed through the 1-2-3-4 clutch regulator valve where it enters the exhaust backfill fluid circuit.