The problem with these shit autoboxes is as Budleigh mentioned, they are operating over there limits, especially here at the reef where your turbo has a bit of overboost.
My autobox never gave any indication that it was about to fail, it was fine and then i tried to pull off in traffic and the rev counter just went up and the car didn't move. It was a fantastic feeling, Especially since I was 700km from my house...
My car got towed to BMW and they came back with a 75k quote to put a new autobox in as they said they don't repair them they just replace them.
If your worried about this box its probably your gut trying to warn you lol.