slide 'BANG' won't go out!

[oldbird]

Its been awhile since I've been on here. Anyway, brought the slide in and before it was all the way in on the rear end of the door side I heard a loud bang. Got to our destination and the slide on the rear end wants to go all the way out but the slide end by the door makes it out about a foot and stops. Stopped it and it went all the way back in, both sides. Just after Joe sold his old DRV I bought a slide gear from him so at least I have that. Going to drop the bottom tomorrow morning to see what I can see. Any suggestions? Thanks