LOUD vibration from roof.
 

Hello everyone. Hope the holiday season finds you in good spirits.
I live in Phoenix, so the fact that I don't have to garage Miss Mellow Yellow in the winter is enough to overcome any holiday blues :)))
My question:
2008 C6 Convertible.
Right about the time I hit 60mph, there is a deafening vibration coming from the roof; towards the front where the top and windshield connect.
Looking at it from the outside while the top is up, I don't notice anything that would alert me to an issue.
And its LOUD. Like, you really have to turn the music up to a level that is burdensome if you have a passenger.
But soon as you hit 59 mph, it dies down, and then is gone.
Anyone else experienced this, or know of a fix?
Thanks!

Welcome to the forum.
While not that familiar with ragtops, the first thing I would check would be the latch down of the front to make sure it's sealing tight to the windshield header.