4-5-6 Clutch Applies

R-1/4-5-6 Pressure Control Solenoid 3 

The R-1/4-5-6 pressure control Solenoid 3 (PCS) is commanded ON allowing actuator feed fluid to enter the PCS R-1/4-5-6 clutch fluid circuit. PCS R-1/4-5-6 clutch fluid is routed through orifice #21 to the R-1/4-5-6 clutch regulator valve and, through orifice #22 to the R-1/4-5-6 clutch boost valve.

R-1/4-5-6 Clutch Regulator Valve 

PCS R-1/4-5-6 clutch fluid moves the R-1/4-5-6 clutch regulator valve against R-1/4-5-6 clutch regulator valve spring force to allow line fluid to pass through the valve an enter the R-1/4-5-6 clutch feed circuit. R-1/4-5-6 clutch feed is then routed to the 4-5-6 clutch boost valve and clutch select valve 2.

4-5-6 Clutch Boost Valve 

PCS R-1/4-5-6 clutch fluid pressure acts on a differential area moving the R-1/4-5-6 clutch boost valve against the R-1/4-5-6 clutch boost valve spring. R-1/4-5-6 clutch fluid passes through the valve and enters the R-1/4-5-6 clutch feedback circuit. As PCS R-1/4-5-6 clutch fluid pressure is increased to a given value, the R-1/4-5-6 clutch boost valve opens the R-1/4-5-6 clutch feedback circuit to exhaust. This results in the R-1/4-5-6 clutch regulator valve moving to the full feed position, sending full line pressure to the clutch.

Clutch Select Valve 2 

R-1/4-5-6 clutch feed fluid passes through the clutch select valve 2 and enters the 4-5-6 clutch feed circuit. The 4-5-6 clutch feed fluid is routed to the clutch select valve 3 where it passes through the valve and enters the 456 clutch fluid circuit. The 456 clutch fluid is routed to the 4-5-6 clutch, the 4-5-6 accumulator, #9 ball check valve and to the #4 ball check valve. The 4-5-6 Clutch fluid seats the #9 ball check valve and routes fluid through orifice #39. The 4-5-6 Clutch fluid passes through orifice #14, seats #4 ball check valve against the PS4 fluid circuit and routes fluid to the CSV 2 latch circuit.

4-5-6 Clutch 

The 4-5-6 clutch fluid enters the 4-5-6 clutch housing to move the piston against spring force, combined with force from the compensator to apply the 4-5-6 clutch plates.