My driver side window has had some issues rolling up but it has always managed to roll all the way up in a timely matter. As of today, not so much. I went to roll it up and it was extremely slow and completely stopped at maybe half way, I had to assist it the rest of the way by pushing the glass towards the left side of the door frame. When I tried rolling it down it was slow and kinda jumpy... I thought maybe a window motor? I am not completely sure. When in doubt go to CF! Thanks in advance for any help or advice.

 

Try spraying silicone in the tracks it rides in see if it helps.

 

My passenger side window is running slower then it should to but I have checked it and I know that the motor will probably be going out soon. But i really don't care because I don't sit on that side. LOL
But like freegdr said spray the rails and see if it help for a while.
Good Luck!

 

X2 if this doesn't help, you'll need to replace the motor and regulator. It could be either or going bad but while your in there you may as well do them both