I have power windows and one day I lowered it and the glass almost fell out of the driver side. Took off the panel and see that the vertical slider near the jamb is disconnected from the window. Put the slider in the track and used a c-clamp to put the window back into the rubber slider. Went to put the window up and now I see that one of the diagonal slides is still connected but off of the track. Maybe i did it putting the other slider back in. The slider doesn't have enough travel to get back in the track, anyone know how I can get the rubber piece off of the vertical slider that i just fixed so i can move the window and put it back into the track?

Sorry for the essay

 

I had that same thing happen to me. So I bought a new rubber wheel and used a drimmel to shave some off the back side and then used a bolt that you would use to screw down a toliet with two metal nuts between where the old piece popped out.

 

where sis you get the rubber wheel? and how did u attach the screw to the window, the stud that goes into the rubber is still on there

 

First you need to find out why this happen! In most cases it is because one or more of the tracks have loose mounts. This will then lead to bent regulator arms and the NYLON, not rubber, rollers will often pop off.
In some cases you can just reattach the rollers but you have to fix what caused the problem first, or it will just happen again.
Pull the entire motor/regulator out of the door and inspect it for bent/damaged parts. Inspect the tracks, for damage, and make sure they are mounted securely, and adjusted properly.
If you are unsure of what the regulator is suppose to look like you can buy the entire motor/regulator assembly, complete with rollers attached.