Tailgate Window on 2nd Gen. 4R
 

So my 1994 4Runner tailgate window still rolls up and down. However, it is having some problems. One side of the glass appears to have come loose from whatever attachment connects the arm that moves the glass. I now only manually lower the glass by key from the rear because I have to use one hand on top of the glass to lightly push down the side that has become detached so it doesnt lower unevenly.

I've tried removing the panel from the inside of the tailgate to see what I could find but for those who know it gets pretty complicated once open. Anyone have any ideas where to go from here?