Hoping for some help. When I go over 40mph I start to get a high pitched whistle/wind type noise. It gets louder the faster I go. I've tried getting up to speed and taking it out of gear and the whistle stays the same so I don't think it's the turbo as I assume it slows down when the revs go down. Then I thought maybe wind noise but the door rubbers look OK. So I don't know. Could it be a bearing? Or could it have something to do with a belt or air con or something. Any ideas would be appreciated. Cheers