4-5-6 Clutch Applies

WARNING: This page is about a different variant/trim than selected.

R1/4-5-6 Pressure Control (PC) Solenoid

The R1/4-5-6 PC solenoid is commanded ON allowing actuator feed limit fluid to enter the PCS R1/4-5-6 clutch fluid circuit. PCS R1/4-5-6 clutch fluid is routed through orifice #11 to the R1/4-5-6 clutch regulator valve, and through orifice #34 to the R1/4-5-6 clutch boost valve.

R1/4-5-6 Clutch Regulator Valve

PCS R1/4-5-6 clutch fluid, at the R1/4-5-6 clutch regulator valve, opposes R1/4-5-6 clutch regulator valve spring force and orificed R1/4-5-6 clutch feed fluid pressure to regulate line pressure into the R1/4-5-6 clutch feed circuit. R1/4-5-6 clutch feed fluid is then routed to the clutch select valve, the R1/4-5-6 clutch boost valve, and through orifices #9 and #12 to the spring end of the R1/4-5-6 clutch regulator valve. When the R1/4-5-6 clutch regulator valve is in this position, latch fluid exhausts through the valve allowing 4-5-6 clutch fluid to shuttle the #1 ball check valve.

R1/4-5-6 Clutch Boost Valve

PCS R1/4-5-6 clutch fluid pressure acts on a differential area, moving the R1/4-5-6 clutch boost valve against R1/4-5-6 clutch boost valve spring force, to regulate R1/4-5-6 feed clutch fluid into the R1/4-5-6 clutch feedback circuit. As PCS R1/4-5-6 clutch fluid pressure is increased to a given value, the R1/4-5-6 clutch boost valve opens the R1/4-5-6 clutch feedback circuit to exhaust backfill. This results in the R1/4-5-6 clutch regulator valve moving to the full feed position, sending full R1/4-5-6 clutch feed pressure (full line pressure) to the 4-5-6 clutch.

#1 Ball Check Valve

Orificed 4-5-6 clutch fluid pressure seats the #1 ball check valve against the exhausting latch fluid passage. 4-5-6 clutch fluid is then directed into the latch circuit to replace the exhausting latch pressure and is routed to the clutch select valve. Latch fluid combines with clutch select valve spring force and holds the valve in this position during all six forward gear ranges.

Clutch Select Valve

R1/4-5-6 clutch feed fluid passes through the clutch select valve and enters the 4-5-6 clutch circuit. 4-5-6 clutch fluid is routed to the 4-5-6 clutch assembly, and through orifice #2 to the #1 ball check valve.

4-5-6 Clutch

4-5-6 clutch fluid enters the 3-5-reverse and 4-5-6 clutch housing assembly, and moves the 4-5-6 clutch piston against spring force and exhaust backfill pressure to apply the 4-5-6 clutch plates.

Accumulator

PCS R1/4-5-6 clutch fluid is also routed to an accumulator valve. The accumulator valve is used to dampen any pressure irregularities occurring in the PCS R1/4-5-6 clutch fluid circuit. This helps to control clutch apply fluid pressure and clutch apply feel.