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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, Third Gear >> 3-4 Shift Valve

3-4 Shift Valve

Spring force holds the valve in the downshifted position, blocking 3-4 clutch fluid in preparation for a 3-4 upshift.