heard a pop when closing roof now when opened it crunches as it finish closing and wont open from rear to front?
any ideads or does anyone know where i can find a parts break down?

 

First make sure the track is clear of any debris or small pebbles. Try lubricating the track with WD40
I am guessing here as never had a slider only the one that lifts up. Try and lets know

 

I've looked in my manuals and cannot find anything. I also did a search on the net, all I found out was that it seems like a common problem, I repaired one on a different Chrysler product many years ago but I don't remember much about it. Try doing a search for jeep moonroof and see if you have better luck than I did. Good luck and if you find anything please post it.