Model: Toyota ES300 sedan, A540E automatic transmission.
     Failure symptoms: the car D gear forward, the speed can not increase with the throttle and then growth, and gradually decline, there is a slip phenomenon.
     Diagnosis and exclusion: the demolition found a group of friction plate burned, the transmission has a coke flavor, replace the friction plate after the test is normal. But by the high-speed driving 1,500 km after the phenomenon of slipping, disintegration examination, but also the same group of friction plate burned. Carefully check and find a tubing with a depression. Failure is due to tubing depression, resulting in insufficient pressure, clutch slip caused by heat.
     Replace the tubing, troubleshooting.