Doesn't seem to be more than a glitch, but experiencing unusual acceleration in 3.0 '02 a6 quattro at around 3k rpm...feels like downshift, but i'm in triptronic 5th gear (shouldn't downshift in trip at all as long as it's in operating range, i figure); revs increase by 200 to 250 rpm; happens in all gears (in trip) once it gets up to around 3k. Anyone else with similar problem? Is it a vacuum issue perhaps? ideas?