I know there were some having problems with the retainers on the joints allowing them to come apart. One of the things I did to keep the caps in place was to give each one a small spot weld. I don't know if this has helped but I haven't had any issues and I have wheeled it pretty hard. This is a pic of what I did:
My Jk Is running on 32's. I don't wheel it real hard. I broke the right front at BVORR it apperead the retaining clip failed. I was at the beach yesterday when I broke the left front in powdery sand. I was not wheeling hard at all. The U-joint actually snapped. Can anyone recommend a replacement u-joint that is not $200 or more? Also when this u-joint snapped it caused the left front axle seal to start leaking, is this common. I've never had a axle seal leak from a u-joint snapping.