Patent ID: 8670908

Claim:
An automatic transmission characterized by comprising: an input shaft that is connected to a drive source; an output shaft that is connected to a driving wheel; a one-way clutch; a plurality of friction engagement elements which establish a plurality of speeds by changing a transmission path between the input shaft and the output shaft based on the application state of the plurality of friction engagement elements and application of the one-way clutch, one of the plurality of friction engagement elements being a brake that is applied when coasting in a take-off speed; and a controller which determines whether it is possible to initially establish the take-off speed using the one-way clutch based on a predetermined condition, and, if it is determined that it is not possible to initially establish the take-off speed using the one-way clutch, establishes the take-off speed by applying the brake, wherein after the take-off speed has been established by applying the brake, the controller executes changeover control to establish the take-off speed using the one-way clutch by gradually reducing the hydraulic pressure of a hydraulic servo of the brake, and after gradually reducing the pressure according to the changeover control the controller executes quick drain control which reduces the hydraulic pressure faster than the changeover control, and initially establishes the take-off speed using the brake.