I had this problem on my 2010 Edge in January. Took it into the dealer for repair and 2 weeks later, it was 'fixed' - turns out there was a problem with some of the gears and bearings. You think the whine is bad inside the vehicle...they put my Edge up on the hoist and the sound was a ton worse. Now, I'm experiencing problems when I'm moving less then 10MPH or rolling stops. Feels like I'm on a patch of ice, then engine revs, and finally jerks me into gear. Taking it in tomorrow to try to replicate it for them as it doesn't happen all the time. I'm about to demand a new transmission altogether.
Good luck!