@ Hawk 2440
That's my problem, exactly, although it sounds like yours had a longer grace period. I drove to work today, noticed that the transmission was more sluggish/halting than normal, and when I got to my office I heard the gravelly, rock-tumbler type noise when the car was moving from first to second gear. I parked the car, called the dealership, and found this forum. When I drove home: no noise. The transmission still felt a bit sluggish, but the gravelly rasp was gone.
I'm anxious about it too. I went from being overjoyed about the purchase to terrified about the future of my ownership within the span of a day.