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Home >> Ford >> 2006 >> Explorer 4.6 8, RWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission External Controls >> Description And Operation >> External Controls - 5R55S >> Transmission Control Switch (TCS)

Transmission Control Switch (TCS)

The transmission control switch (TCS) is a momentary contact switch located on the selector lever knob. Pushing the TCS will either disengage or engage the overdrive function of the transmission. If overdrive (D) is disengaged, the message O/D OFF will illuminate on the instrument panel.