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Home >> Chevrolet >> 2011 >> Impala LS, 3.9 M >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Automatic Transmission - 4T65-E - Description And Operation) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Overdrive Range, First Gear >> 1-2 Shift Solenoid (SS) Valve (315A)

1-2 Shift Solenoid (SS) Valve (315A)

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Energized (ON) by the PCM, high pressure in the 1-2, 3-4 signal fluid circuit holds the 12 shift valve in the downshifted position. 1-2, 3-4 signal fluid also is routed to the 3-4 shift valve, but is not effective.

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