So I'm in process of changing out a cv, and ran into a bit of a problem. Can't get that dang nut off the axle. Tried an impact gun, then a breaker bar, and then a breaker bar with a 4' pole extension only to be taunted with utter failure. I'm getting a lurking feeling that it may have welded itself on :x... any tips or input on what I can do about this?