Transmission Control (TC) Switch

WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

The transmission control (TC) switch:

is located in the selector lever handle.
- The TC switch is removable from the selector lever handle without disassembly of the console or selector lever unit.
is a momentary contact switch.
commands the powertrain control module (PCM) to disengage or engage the overdrive function of the transmission.
- When overdrive (D) is disengaged, the message O/D OFF will illuminate on the instrument panel.