Have a 98 F150 and the driver side window came off the track. Took the door panel off and got it back in the track. Two days later the window came off the track again. Before I take the door panel off again I thought I would see if anybody here as any suggestions about why the window keeps coming off track.

Richard

 

Never saw one come off track that wasnt physically broken somewhere. Most of the complaints of coming off track are actually windows that were lowered and raised while traveling at highspeed and the vacuum sucked the glass outward. I would have to say you have a broken regulator or window run or the felt is worn/torn.