A failure detecting device for an automatic transmission, and an automatic transmission equipped with the detecting device

摘要

(10c) for monitoring the current speed change stage of the step-variable automatic transmission, a failure detection means (10d) for detecting the occurrence of a failure and the type of failure from the behavior of the vehicle caused by the failure, When the occurrence of the failure is detected by the switching, the combination of the friction engagement elements to be converted and applied at the time of switching the speed change stage, and the failure location limiting means 10e. As a result, the limp groove speed change stage can be specified quickly during traveling, and transition to the limp groove change speed stage can be performed, so that great stress is not given to the driver.