Try getting a screw driver or something behind it to put outward pressure on it as you turn it maybe?

 

Tried it...still no luck. How hard would it be to back the stud out, or should I try to dremel or chisel the nut off.

 

I don't know the possibility of backing the stud out...if it were me, I'd probably try to dremel the nut off first.

Silly question: since you can spin it with your fingers, is it possible to push or pull it off while spinning?

 

Nope..it spins freely and wiggles around a little bit but won't come off.

 

Ok, so it could be last resort time, how about this, take your socket and put some type of adhesive inside of it, maybe JB Weld, or some metal-on-metal adhesive, see if you can get the nut to adhere to the nut (but not the stud) and once it is stuck in the socket, maybe that would provide some pressure to get the nut off...

...then again this method (if it works) will ruin the socket and nut...and if it doesn't work you'd then have a socket stuck onto the nut.

Do you think the nut is the culprit, or the stud?

 

I think it would be safer to just dremel it off at this point.. See if you can cut two vertical slices in it to break it in half off the thread.. You want to keep as much thread on that stud as possible.

 

Yeah, think that's what I'll try tomorrow or something....thanks for your help.

 

find a friend and hold the nut from underneath the car

 

This same thing happened to me, and yeah it flippin sucks. I can't remember what I ended up having to do...I think I had to put pressure on the nut from behind with a prybar as I turned it with a socket and eventually I worked it off, then had to run a die over the stud and was able to salvage enough threads that it was still useable.

I would recommend replacing all the nuts. I had one nut on the passenger side bind up and snap off about 1/2" of the stud, and had one on the passenger side do what you're describing. I think the distorted-thread style locknuts they use do that when there gets to be some rust, everything just gets all boogered up. I used regular nuts instead and have it double nutted and have not had an issue with getting it back apart since.

 

If you can tighten the nut back up enough maybe you can run a die over the last few threads of the stud and then back the nut off.