I've started to notice a slight whine in 5th and 6th gear while cruising anywhere from 45-65mph round about. It isn't that loud and disappears completely when I engage the clutch and/or put it in neutral. I do not notice the whine on deceleration either but I hear a grinding/dragging noise...almost like gears maybe. But this happens in any gear at most speeds. I don't think it is TC death whine since it goes away when the clutch is engaged or when it is in neutral. I took a video but it's hardly audible in the video. Any ideas?