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Home >> Pontiac >> 2010 >> Solstice Base, 2D Convertible, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (Automatic Transmission - 5L40-E/5L50-E - Description And Operation) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Overdrive Range, First Gear (After First 1-2 Shift) >> Coast Clutch Applies

Coast Clutch Applies

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2-3 Shift Solenoid (SS) Valve

The 2-3 SS valve is energized, allowing feed limit fluid to enter the 2-3 signal fluid circuit. 2-3 signal fluid overcomes 2-3 shift valve spring (372) force and moves the 2-3 shift valve (371) to the applied position.

1-2 Shift Control Valve and 1-2 Shift Valve

2-3 signal fluid is routed to the 1-2 shift control valve (366) and moves the valve against 1-2 shift control valve spring (367) force to the applied position. This allows feed limit fluid to enter the FDL fluid circuit. FDL fluid is routed to the 1-2 shift valve (387) and moves the valve against 1-2 shift valve spring (388) force to the applied position to block D13 fluid at the valve.

3-4 Shift Control Valve and 3-4 Shift Valve

2-3 signal fluid is also routed to the 3-4 shift control valve (346) and moves the valve against 3-4 shift valve spring (344) force to the applied position. This allows D13 fluid to enter the 123 fluid circuit at the 3-4 shift valve (345).

#4 Ball Check Valve

123 fluid seats the #4 ball check valve and passes through orifice #16. This orifice helps to control coast clutch apply.

4-5 Shift Valve

Orificed 123 fluid is routed to the 4-5 shift valve (374) where it passes into the coast clutch fluid circuit.

Coast Clutch Assembly

Coast clutch fluid is routed to the coast clutch piston to apply the coast clutch plates.