I have an interesting window issue-

When my passenger window reaches the top of it's track it "bounces" of the top of the door and comes back down a half inch or so (this process happens pretty quick). If you hold the switch up it does this repeatedly and VERY fast. The impact is relatively loud as well... as if the motor is just pushing it up too hard/fast. Any idea what could be causing this? The driver's side doesn't have this problem.

note that I just swapped the doors from a 1999 Ex, and I still have my other doors/windows/motors/etc if any of those components are what's causing the problem.

thanks guys.