2-6 CLUTCH APPLIES
CB26 Pressure Control Solenoid 4
The CB26 pressure control solenoid 4 is commanded ON, allowing actuator feed fluid to enter
the PCS 26 clutch fluid circuit. PCS 26 fluid is routed through orifice #44 and then to the 2-6
clutch regulator gain valve.
2-6 Clutch Regulator Gain Valve
The 2-6 clutch regulator gain valve allows the gain (valve input to output pressure magnification
factor) of the 2-6 clutch regulator valve to be different for a 1-2 shift verses a 5-6 shift. For a 5-6
shift PCS 26 clutch fluid pressure passes through the hollow valve and only acts on the 26
regulator valve area, resulting in the "low gain" pressure output.
2-6 Clutch Regulator Valve
PCS 26 clutch fluid moves the 2-6 clutch regulator/gain valve assembly against the 2-6 clutch
regulator valve spring force to allow 26 clutch/1234 clutch feed fluid to pass through the valve.
The 26 clutch/1234 clutch feed fluid is routed into the 26 clutch fluid circuit where it passes
through orifice #41 and then to the spring end of the 2-6 clutch regulator valve, and to the 2-6
clutch within the center support.
2-6 Clutch
The 26 clutch fluid from the 2-6 clutch regulator valve is routed through the center support and to
the 2-6 clutch piston assembly. The 26 clutch fluid pressure moves the piston against 2-6 clutch
spring force to apply the 2-6 clutch plates.
3-5 CLUTCH RELEASES
C35R Pressure Control Solenoid 2
The C35R pressure control solenoid 2 is commanded OFF, allowing PCS 35 reverse clutch fluid
from the 3-5 reverse clutch boost valve and the 3-5 reverse clutch regulator valve to exhaust
through the solenoid.
3-5 Reverse Clutch Boost Valve
The 3-5 reverse boost valve spring force moves the valve to allow 35 reverse clutch feedback
fluid from the 3-5 reverse clutch regulator valve to enter the 35 reverse clutch circuit and exhaust.
3-5 Reverse Clutch Regulator Valve
2008 Chevrolet Silverado 1500
2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado,
Sierra & Silverado