4 Speed Overdrive Transmission

Automatic Transmission Electrical Connections (4 Speed):

PURPOSE

The PCM applies and removes the ground from this solenoid to engage or disengage the lock-up torque converter.

OPERATION

The lock-up torque converter is only locked up when the transmission is in direct drive mode.

If the PCM receives a signal from the throttle position sensor that an increase or decrease in throttle is needed (when the transmission gear selector is in direct drive), the PCM will disengage the part throttle solenoid causing the lock-up torque converter to be disengaged.