Bad news, according to Mario at AT Overland, I am the first JK Habitat to have broken the torsion bar.
I was camping last weekend, and while packing up, I heard an ear-ringing pop. I noticed a bunch of rust debris on the hood, and the fiberglass tube that surrounds the torsion bar was split open. Luckily, I was camping with a friend because I don’t think I could have closed the top by myself, it is a lot heavier than I expected. I had to lift the lid near vertical by standing on the bumper brush guard while my friend manned the hand crank long enough for me to move to the rear and catch the top as it came down.
I sent AT Overland an email hoping they had a torsion bar collecting dust somewhere in their warehouse, but unfortunately they did not. Mario has been helpful explaining the process of replacing the torsion bar. It sounds like it will be a difficult process where the top has to be held vertically and unloaded for the new bar to be slid into place. I emailed and called the company that made the torsion bar, Foote Axle, but their phone and fax lines are disconnected, and I haven't gotten an email reply yet. Not a good sign.
Right now, I’m trying to get the design specs of the torsion bar and find a company that can make one. If I can’t get the specs, then I’ll have to take some measurements and reverse engineer the old one. Either way, it looks like my camper will be out of commission for a while, and I’ll be ground tenting on my week-long Death Valley trip in a couple of months.
PSA for the habitat owners that still frequent this sub: make sure the fiberglass tube over the torsion bar can allow moisture out. I believe rust was a large factor in mine breaking. According to Mario, that tube is in place to keep the contents contained if it breaks, so don’t go cutting yours off.
So, that's where I'm at right now, Ill keep this thread updated with my progress in the hopes that someone will find it helpful in the future.

