Well I got the window back on the front track. So I can at least get the window up, I could probably even continue to use it. Judjing from the condition of some of the screw covers and the dust on the track that fell off, I suspect that this happened to the previous owner and he just left the broken track in the bottom of the door. I tried opening and closing the door, to see if I could hear the track rattling around in there and I couldnt. So I think its safe to assume that the piece was broken for a while. I always thought the window sounded funny when it was 3/4's of the way up. I will post pics of the fix, once I get it done. I just have to track down my camera.