I've searched all over the net and newsgroups and can't seem to find
anyone that has experienced the problem I'm having. Our E350 15
passenger van has just recently started making a very loud vibrating
noise that comes from the roof. When it started, you'd have to be doing
70 mph to make it happen. Now it happens at 50 mph. The closest thing
I've found online is someone talking about a harmonic vibration on an
excursion they had. Could that be it? If so, what could I do about it.
Oh, it's probably worth the mention that the previous owner drilled a
hole near the front center of the roof for a CB antenna. I removed the
antenna base (the antenna itself had been removed long ago) and plugged
it with some stuff that's like JB Weld, only thicker. It dries as hard
as steel. We thought that doing that fixed the problem, but the noise
came back in 2 weeks.
If anyone has ANY ideas at all, please reply. We use this van to
transport children to and from school for our daycare. The noise scares
Many thanks for your time.