Dumb question

[johnny08]

alright i just bought my first jeep and i've noticed when the top is up and i put the windows down the back windows cave in a good bit, it has also done this when in the sunrider position. I just dont really know what is normal

 

[redrooster]

Simple answer is pressure. When you drive, high pressure is created outside your vehicle due to the displacement of air around the vehicle. The interior is not subjected to as much of a pressure change since it is out of the airstream. A vacuum of sorts is created by the high pressure sucking out the low pressure. I think you need Mr. Wizard for the full explanation.

 

[southtj]

Yup that's normal. And they should bulge out with the windows up and the ac or heat blowing.