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Home >> Hummer >> 2007 >> H3 Automatic >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4L60-E/4L65-E/4L70-E - Removal & Installation, Overhaul, Troubleshooting & Diagnosis >> Description and Operation >> Overdrive Range, Fourth Gear - Torque Converter Clutch Applied >> 1-2 Shift Valve

1-2 Shift Valve

D432 fluid pressure from the 2-3 shift valve and spring force hold the valve in the upshift position against signal A fluid pressure.