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Fig. 210: Drive Range, Second Gear DRIVE RANGE, THIRD GEAR As the vehicle speed increases, the transmission control module (TCM) receives input signals 3-5 REVERSE CLUTCH APPLIES C35R Pressure Control Solenoid 2 The C35R pressure control solenoid 2 is commanded ON allowing actuator feed fluid to enter the 3-5 Reverse Clutch Boost Valve
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
PCS 35 reverse clutch fluid pressure acts on a differential area moving the 3-5 reverse clutch 3-5 Reverse Clutch Regulator Valve PCS 35 reverse clutch fluid moves the 3-5 reverse clutch regulator valve against 3-5 reverse 3-5 Reverse Clutch The 35 reverse clutch fluid enters the 1-2-3-4 and 3-5 reverse clutch housing to move the piston 2-6 CLUTCH RELEASES CB26 Pressure Control Solenoid 4 The CB26 pressure control solenoid 4 is commanded OFF allowing PCS 26 clutch fluid from the 2-6 Clutch Regulator Valve The 2-6 clutch regulator valve spring force moves the valve to allow 26 clutch fluid from the 2-6 2-6 Clutch The 2-6 clutch spring force moves the 2-6 clutch piston to release the 2-6 clutch plates and forces
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Fig. 211: Drive Range, Third Gear DRIVE RANGE, THIRD GEAR DEFAULT If the transmission is in 1st, 2nd or 3rd gear during a transmission electrical component failure, 1-2-3-4 CLUTCH STAYS APPLIED Shift Solenoid 2 Shift solenoid 2 defaults to it's normally-closed state (OFF), and SOL 2 fluid exhausts through the Clutch Select Valve 3 Solenoid 2 fluid pressure no longer holds the clutch select valve 3 open. When the valve moves
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
1-2-3-4 Clutch Regulator Valve With the absence of PCS 1234 clutch fluid, due to the default state of the C1234 pressure control 1-2-3-4 Clutch With the 1-2-3-4 clutch regulator valve still held in the open position, the 1-2-3-4 clutch will stay 3-5 REVERSE CLUTCH APPLIED OR APPLIES C35R Pressure Control Solenoid 2 The normal state for the C35R pressure control solenoid 2 is ON, therefore PSC 35 reverse clutch 3-5 Reverse Clutch Regulator Valve PCS 3-5 reverse clutch fluid moves the 3-5 reverse clutch regulator valve against 3-5 reverse 3-5 Reverse Clutch Boost Valve PCS 3-5 reverse clutch fluid pressure acts on a differential area moving the 3-5 reverse clutch 3-5 Reverse Clutch The 3-5 reverse clutch fluid enters the 1-2-3-4 and 3-5 reverse clutch housing to move the piston
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 6L50/6L80/6L90 - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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