wanna,i just did mine, you can remove the glass by itself to relace said nylon/plastic glides,or better yet remove all the inner door panel screws and you can then remove the vent window and the attached fwd.track,that way you will be able to bend the track slightly to conform to the curviture of the glass,as keoke mentioned,usually not the problem though,with worn glides the window becomes cocked in the frame and jams,usually replacing the nylon/plastic glides will correct the problem,nows the time to check if you need to replace the thick rubber seal that surrounds the vent window, i bought two today $18.00 each,also check if the rubber seal that runs along the fwd.part of the glass in the frame needs to be replaced,youll need to drill the two rivets remove the old seal,clean the track, replace the seal then replace the two rivets.for this seal i used a section of inner tube ,folded it around the front part of the glass,slid it back into the track and trimmed each side with a razor.all this might sound complicated but when you start doing it youll see this all makes sence,i hope. /ubbthreads/images/graemlins/hammer.gif