1996 Bronco/F-Series

Section 07-01C: Transmission, Automatic, 4R70W

1996 F-150 (4x2) (4x4) and Bronco Vehicles Equipped with 5.0L Engines Workshop Manual

DESCRIPTION AND OPERATION

Transmission Control Switch (TCS) and Lamp Operation

The transmission control switch is a momentary contact switch. When the switch is pressed, a signal is sent to the powertrain control module (PCM) (12A650) to allow automatic shifts from first through fourth gears or first through third gears only. The powertrain control module energizes the transmission control indicator lamp (TCIL) when the switch is off.

NOTE: TCIL will also flash if the EPC circuit is shorted, or monitor sensor or actuator fails.

Transmission Control Switch (TCS) Activated

Overdrive may be cancelled by pressing the transmission control switch (TCS) on the gear selector lever.

With overdrive cancelled the transmission will allow automatic shifts from first through third gears only.
Overdrive shifting though all four gears may be activated again by pressing the TCS.
This should be done at closed throttle for best shift response.