I'm trying to remove a nut and bolt from my truck's shock absorber so I can change it. I have a wrench on one side holding it down and another wrench on the other side spinning it, in an attempt to remove it. Sounds simple enough. However, even though I'm spinning out the nut, it doesn't come out. It just spins in place. I've never come across this issue before. Hammering it doesn't seem to do anything and there's no room to try and stick a flat tip screwdriver in there and try to pry it apart. The threads that are visual seem to be in tact anyways. Does anyone know how to resolve it?