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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 246 (Automatic Transaxle - 4T65-E - Overhaul) >> Description and Operation >> Automatic Transmission Hydraulic Diagrams >> Overdrive Range, Second Gear (Without Touch Activated Power) >> 1-2 Shift Valve (318)

1-2 Shift Valve (318)

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With the 1-2, 3-4 SS valve OFF, spring pressure moves the valve allowing D4 pressure to enter the 2nd fluid passage directing 2nd fluid to the Number 2 ball check valve.

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