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Home >> Ford >> 2001 >> Expedition 5.4 L, 4WD >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Transaxle/Transmission - External Controls >> Diagnosis And Testing >> External Controls >> Transmission Control Switch (TCS)
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Transmission Control Switch (TCS)

The transmission control switch (TCS) is a momentary contact switch that is located on the end of the transmission control selector lever. Pushing the TCS will either disengage or engage the overdrive function of the automatic transmission. If the OVERDRIVE is disengaged, the word OFF will illuminate on the transmission control selector lever.