I had to replace my ball joints and went ahead and did bearings, seals and u-joints while I was at it. I had to take one of the rotors back off the following day after I had driven it and I found the pin broken on the spindle nut. I used the information out of the manual to tighten them - torque it to 50 ft pound and then back it off 90 degrees install the locking ring and then the locking nut and torque to 150 ft pounds. I replaced the nut and installed it and once I had it locked down I took it apart to see if the pin was intact which it was. On the other side I replaced all the same parts and drove it around and when I took it back apart to check that pin it to had broken. My question is what would cause these pins to break, I verify that they are lined up with the hole in the locking ring and the installation procedures should be correct as far as I can tell but it seems I am doing something wrong for these pins to keep breaking.