The nut in the frame that holds the shackle in broke free, and backed off. I was able to move the bolt 3/4" in and out, but not tighten or loosen it.
After cutting into the frame from the top (which took a while) and welding it up, rollins returned my call. Apparently the smart thing to do would have been to drill a hole through the frame next to the nut, and plug weld it.
doh.