Amazing how little info there is on this problem. I have had an entire teams forks rebound shaft get stuck. 20 forks in all and more keep coming in with the same problem. The problem is rather easy to fix but the rebound shaft needs to be removed from the damper rod. Once you accomplish this a clamp can be used to hold the upper shaft and a little more force along with some lube inside the threaded piece on the bottom will usually free it up. I made a clamp with a two pieces of wood that I drilled between with the correct size bit. The damper is 1/4" and the damper shaft is 10mm. Clean/ polish the small ball bearing that resides inside and reassemble with some waterproof grease. I think the problem is Fox not greasing prior to assembly and the bearing rusts. It still takes a bit of force to take the pieces apart, they are threaded together so turn counter clockwise and hopefully not break anything or a new damper shaft will be needed. You will also need 7mm wrench with thin jaws to remove the damper rod, at least on the Float 32 with a fit4 damper.
