Having some issues with the power window on the passenger side. It seems to tilt forward as it goes up, then it slows down, and finally speeds up and goes up the rest of the way.

I am thinking that it is likely I just need to tighten the window holding thingies (technical term), but was wondering if there was something else that could cause this. Better to know before I start pulling the door apart!

98 Silver Frost SVT 97 BMW 540I Sport, six speed "Blue is for sky, black is for soil, and white is for simplicity, purity and hope for the future" "A coveted car should never stunt your life, but should make it more rich and interesting."