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Home >> Pontiac >> 2007 >> Solstice GXP, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Automatic Transmission - 5L40-E/5L50-E - Introduction (2 Of 2)) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Overdrive Range, First Gear (After First 1-2 Shift) >> Coast Clutch Applies

Coast Clutch Applies

WARNING: This page is about a different variant/trim than selected.
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 D432 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 D432 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.

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