Braking or not braking doesn't seem to affect the noise. It is definitely coming from the transmission, when stopped and still in gear only. Again, no noise at first when driving, but after about 15 minutes (or once transmission is warm), start hearing a high pitched whining under the car only when stopped and still in gear. once it starts, each time i stop, the noise is louder and eventually starts to sound like grinding. If i switch into neutral or park, sound goes away. If i start to accelerate, sound goes away. But second I stop and in gear, sound returns, louder than the last time I stopped. Possibly clutch, seems like driveshaft isn't disengaging from A/T when stopped?