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Home >> Hummer >> 2009 >> H3 Base, Automatic >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Automatic Transmission - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Description And Operation >> Overdrive Range, 3-2 Downshift >> 2-4 Servo Assembly
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2-4 Servo Assembly

The 3rd accumulator fluid exhausts from the servo assembly. The 2nd clutch fluid pressure moves the 2nd apply piston against the servo return spring force in order to move the apply pin and apply the 2-4 band.