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In the Neutral position, the manual valve blocks the line pressure from entering any other fluid Lo and Reverse Clutch Releases Lo and Reverse Clutch Piston PR and Lo/reverse fluids exhaust from the piston, thereby releasing the lo and reverse clutch Lo Overrun Valve Spring force closes the valve when the PR fluid pressure exhausts. Lo/reverse fluid exhausts Reverse Input Cutch Releases Reverse Input Clutch Piston Reverse input fluid pressure exhausts from the piston, through the boost valve, past the #3 Reverse Abuse Valve Reverse fluid pressure exhausts and spring force closes the valve. Boost Valve Reverse input fluid pressure exhausts and line pressure returns to the normal operating range as in Reverse Input Checkball (#3) Exhausting reverse input fluid unseats the ball for a quick exhaust through the reverse fluid circuit Transmission Fluid Pressure (TFP) Manual Valve Position Switch Assembly IMPORTANT: In Park, Reverse and Neutral the shift solenoid valves are shown energized. This is the normal operating state when the vehicle is
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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