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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 (Before First 1-2 Shift) >> Coast Clutch Applies

Coast Clutch Applies

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#5 Ball Check Valve:

Forward clutch fluid seats the #5 ball check valve and passes through orifice #17 into the coast clutch feed circuit. This orifice helps to control coast clutch apply.

Safety Mode Valve:

Before the first 1-2 shift has occurred, the safety mode valve (34)1 remains in the released position, allowing line fluid pressure to enter the line safety mode fluid circuit.

4-5 Shift Valve:

Line safety mode fluid applies the 4-5 shift valve (374) against 4-5 shift valve spring (373) force. This allows coast clutch feed fluid to enter the coast clutch fluid circuit.

Coast Clutch Assembly:

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