Door shakes at high speed...

[e30kid]

OK, I have no idea where else to post this... My drivers side door was making a humming noise at 100mph and I had no idea what it was, so I decided to go faster. At 120mph I almost shat myself, out of nowhere my door started to shake, I mean to the point where I was wondering if it was shut. What could be the problem, I looked at the door and there are no dents and it isn’t misaligned.

[Jon325i]

Is it just the door that's shaking or is there anything else doing the same? If your door seals are shot this could allow a little movement to occur since good seals offer a bit of cushion for the door against the body. I think the shaking got worse as you went faster due to the increased air pressure of higher speeds. If those seals are in fact shot, there's wind getting into places it shouldn't. At least that's my speculation.

Jon