Originally Posted by APM28
I have a Roadster and I noticed when driving with the windows clear down and driving at higher speeds above, say 40 mph and higher, that the rear window begins to shake a lot and if you raise the windows up that shaking stops. So it may be a vibration problem also, over time. You can lower the windows a couple of inches and it will not vibrate. Has anyone else noticed this?
Yep, I was going to mention this too. High speed runs should be made with the top down or with the windows shut.