I have a 1997 Montero and when you get up to about 50 mph the windshield trim starts to hum or vibrate. It had this problem when new and I took it back to the dealer. I had the windshield replaced a year ago and now it has started again. Does anybody know how to fix it? John

 

probably the trim around the outside of the window. See if its loose, and if so find a way to secure it.