Wow, thank you all so much. It is definitely that large PTO gear hanging on the shaft. I could not move the front case back in place enough to get a pry bar in to relieve the stress on that gear, so I took the four retaining bolts out careful not to lose a hand in the process and then tried again backing the forklift. It's still stuck, but at least I'm not confounded about where the problem is. Also, my forklift started having fuel problems, would run for like 3 seconds and shutdown. The stuck gear problem and the forklift problem were getting the best of me from a frustration standpoint, then I started hearing thunder directly overhead. I'm doing this outside as my shop isn't big enough to accommodate all this, so I decided to tarp over everything, get some rest and recoil, and approach the next day (today) in a better frame of mind.