I've got a weird outside spindle nut/ lockout problem. I took the truck in to get a lower ball joint replaced today. They found the driver side spindle nut to be stuck and the lockout had a groove worn in it from riding the nut. These guys busted a snap-on breaker bar and heavy ratchet trying to get the nut off. Once they got it removed they found the inner nut to be in perfect shape. The spindle threads are fine - no cross threading at all. The bearings were properly torqued. Just the single nut was practically welded in place. They checked the opposing spindle and found it to be in perfect condition. Measurements were taken on both sides and a new spindle nut kit ordered for comparison. The nut thickness of the new kit was exactly the same as the old. There is no apparent reason for the damage to the lockout or the spindle nut freezing in place. Anyone have an idea or experience something similar?