What took a dump is a little nylon gear that wraps around that spring like cable. To remove the arm from the glass, you will find a big nut at the bottom. Remove that and you can raise the glass up or down to access what you need. Not sure about the WJ, but XJ regulators are pop riveted in with 1/4" rivets. You will have to drill the heads off with a 1/4" drill bit. To reinstall, I used 1/4X1/2" allen head screws and nylock nuts on the back.