Sounds more like the rubber on the window seal. It starts at about. 55mph
Here is my A pillar story of success and happiness forever:
My Pillar Experiences
First, you might ask what an A-pillar is. It is the A-shaped column that frames the windshield on the left and right sides.
I first experienced rattling in both of my A-pillars when driving south bound on I-25 last month. I was at 70 mph with a crosswind that was at about 45 mph. I-25 does not head due south for the entire trip from Denver to Albuquerque. So, on some compass headings the rattle would arise. On other compass headings the rattle could not be heard. It was not loud but it was noticeable.
What did I do about it? I drove my Explorer into my dealer Don Chalmer’s Ford. They looked at the gasket that lies between the A pillars and the windshield. They told me that the fix would be to order new gaskets. And they told me that the original ones were light and flexible enough to allow air to flow under the A-pillar applique which would then create a rattle. My dealer had dealt with this before a few years ago in a Ford sedan.
Both of my A pillars were fixed 4/11. Don Chalmer’s Ford, Rio Rancho New Mexico used the following parts: SPO BB5Z 7803137 AA, SPO BB5Z 7803137 BA, SPO BB5Z 7803136 AA, and SPO BB5Z 7803136 BA, all listed as moulding windshield. The original vertical gaskets that run along the A pillars were noticeably thinner and easily lifted off the windshield. The new ones are noticeably thicker and more substantial. The install job is perfect. On 4/11 I got it up to 65 mph with a 15 mph crosswind. No noise at all.
A-pillar noise is totally gone now. In Albuquerque we have the intersection of I-40 and I-25 so I had good testing grounds. On 4/14 I drove North ten miles up to 80 mph, South ten miles up to 90 mph, then West five miles at 65mph, and finally East eight miles at 70 mph. All in wind gusts to 65mph. The A-pillars are now royally quiet. The repair worked beautifully. Thank you Don Chalmers Ford. I believe that this should be the standard Ford repair.