I had the same problem and had the fluid flushed (and refilled. needed to be anyway) and the same noise stopped. Or if it is really bad, how loud is it? The noise came up again later after I had some work done at the dealer and it was a lot louder this time. It was because they put the fluid hose too close to one of the pulleys and every time i turned it would get louder from it just slowly shearing away! All fixed now of course. | 
