2006 LJ top alternator bolt sticking

Have a co-worker with a 2006 LJ.

We're replacing the alternator and the top bolt will back about 1/3 f the way out and then gets tighter...to the point of I will break it if I try harder.

Anyone else heard of this issue? Alt bracket is aluminum and of course it's a steel bolt.

We're lubed the daylights out of it and even iced the area down and nada.

And we got it.

Took some threads out of the bracket but it's fixed now. Just need a longer bolt to put a nut on the back side.