Ok, so to start, I've already taken apart the door and removed the window motor a while ago. Except instead of replacing it (the notorious window stopping half way up problem), I modded it so I didn't have to buy a new one.

It has worked great like that, and I used bolts instead of rivets to mount it this time. It's worked great for about a year now, except it my driver side window shakes a lot when going up and down. I already checked the motor again, and it's secured tightly and evenly to the bracket. Any other ideas?

 

Just throwing something out there...but if the window stabilizers were gone...would this cause this condition?

As in this post...
http://web.camaross.com/forums/showthread.php?t=524789