Bizzare problem that only happens at speed

[gui]

When I get my Aurora up to speed on the highway sometimes it howls like someone is blowing on a pop bottle really loudly. It's almost painfully loud. Dropping speed may or may not help until I get it down to 55-60, but the other day it did it at that speed too. This happens sometimes for a mile or two, then stops. Almost always on the highway. It did this for some time a couple of days ago when the wind was blowing really hard. 

Is it possible that air is going across the trunk lid in a way that causes this harmonic audio? I've heard bad wheel bearings and they usually make noise all the time, varying the tone up and down with the speed. I have never heard anything like this before. 

I guess I could test it with duct tape around the opening... 

[AUROD X]

I had similar whistling sound a couple Years back, in my case it was the Windshield and also happened in the Highway when it was windy. It got LOUDER when I push on it, so the Windshield was coming loose bottom Driver side.
Fixed it and all good now...