68 Barracuda Fastback rear windows....
Apologies Murray...rear side windows yes
Those are called rear quarter windows on my Barracuda.
The window may just be off the track or there may be broken plastic rollers.
Mine had a broken roller, I was able to find a replacement on e bay.
I would plan on taking it all out, then you can clean the 50+ years of crud off the rollers and track and the window with the right parts will operate easily.
The quarter window work space in my 68 Barracuda was really cramped, but it is doable.
Un cover both sides, but disassemble then reassemble one side at a time. So you can have a quick reference on how it fits together. Use the search here on FABO and you tube (mopar A body rear quarter window) and with the FSM you will get the info on how to get it working again.
