they are always a pain, NEVER LOCTITE them or threadlock them, so long as you hit the torque your laughing they'll stay, I just returned a friends compressor and impact had to wind compressor to 120psi, and give it the guts to get the castle nut off, I've got 1 more wheel bearing to pile up before I've replaced them all... oie.... I'm going to buy an impact just for the job because I can never get my brakes to hold, and keep my wheels from turning with it in 4 low brakes locked when I bounce on my 2ft breaker bar (250lbs) impact makes quick work of it.