Drive Range Fifth Gear - Torque Converter Clutch Applied: Notes

When the transmission control module (TCM) determines that the engine and transmission are operating properly to engage the torque converter clutch (TCC), the TCM regulates the duty cycle of the lock up pressure control solenoid valve (SLU).

At this time the Torque Converter Clutch is considered to be disengaged (OFF), lock up pressure control solenoid valve maintains a 90 percent duty cycle. TCM decision to apply the TCC. The following events occur in order to apply the torque converter clutch.