AUTOMATIC TRANSMISSION EQUIPPED WITH FRICTION ELEMENT HAVING LOCKING MECHANISM ATTACHED THERETO, AND CONTROL METHOD THEREFOR

摘要

A transmission controller determines whether a vehicle is going to stop based on a driving condition of the vehicle. When it is determined that the vehicle is going to stop, a lock mechanism is placed in an unlocked state through a supply of an OFF pressure to an OFF pressure piston chamber even if a D mode is selected by a select switch.