Lug nut unscrews a couple of turns then locks up

[jimbop2k]

Hello All:

I have a bizarre issue with a 2018 Crosstrek (I hope its okay to ask here). One lug nut came loose with about the same effort as all the others and easily backed off a couple of turns but then it completely locked up. I tried to keep unscrewing it but it was truly stuck. I tried with much more effort than it originally took to break it loose and it absolutely wouldn't move. Anyone know what this is about? I've got an appointment with a shop scheduled for Friday but would like to figure it out myself.

Thanks,

Jim

[silverton]

threads are galled up somewhere on the stud.

[motorbreath]

This kind of thing does not randomly happen, likely the last person to work on the car used an impact gun to start the lug nuts. I always start them by hand, then switch to the impact gun.

You'll need to have the stud replaced and use a new lug nut, but I would go back to the last mechanic that worked on the car for them to fix their mistake.

[jimbop2k]

Thanks Silverton and MotorBreath. I'll go ahead and take it in on Friday as planned.