Plenty of the failures happen to stock rigs too. I have been out wheeling every weekend the past month and usually go at least once a month but normally twice. I would contribute it more to the frequent off-road usage before I do the bumper. Like I mentioned earlier unlike some others I do believe that the extra weight does contribute, but think it comes more from the trails.
COB- yeah I am guessing that is when 2 of the 4 bolts sheared but were still in there. Was driving and tracking fine after the night on the 138 until the night it happened when the other two let loose. Since two of the breaks were aged and two looked new. Found two of the bolts at the site it failed and the head of the one in my driveway.
Now for the bolts. I priced them at 3 local dealers and were between 2.75 and 3.50 each. I went to Toyotapartsales.com and they have them for .84cents each and same with Champion Toyota.
make sure everything is seated properly and torqued to factory spec with Medium thread loctite as per FSM There is a good chance last time I did my CV joints I either over torqued(couldn't find my torque wrench) or didnt have things fully seated and why they broke. Would love to think I am not at fault but not to big to accept it as a possibility.