I've noticed that the common failure with my regulators was that when the window was run down fully, there was no stop to limit the windows downward travel. It then flexes the regulator and loads up the the front and rear plastic clips, forcing one or both off the the track. I cured this problem for both my windows by installing a stop to limit the lower travel of the window opposite the point where the window attaches to the regulator assembly. A 4 inch drywall screw with rubber vac line over the threads run through the stainless steel structure opposite this point works well. Jim 6147 "Adam 16683" <acprice1@xxxx> wrote: >Last year my passenger would not close all the way, the window was >crooked in the slot so when it rolled up the there was a 1/4 inch >open space on the front part of the window. I had took the door apart >and found that the plastic guide clips had come off from the "L" >shaped metal guide rail inside. I put the clips back around the guide >rail and everything was fine until today. Rolled window down, then up >and it was off the track again... >