Not really, everything that I've broken, I can point to hard usage as the cause. My breakage list is actually pretty short. Several sets of front driveshaft u-joints, and eventually a complete replacement shaft. I know that mud was a big part of the problem there. I'm on my 3rd front track bar, an indestructable Clayton this time. I wore out the stock front control arms, so replaced all 8 with JKS. Upgraded the axle shafts before I had any failures there. Busted the stock swaybar links within the first 6 months of ownership, replaced with JKS Discos. Broke a brake line, but that was caused by the relocation brackets that came with my lift kit putting it where it rubbed and eventually wore through. Busted a rear shock offroading, ripped off a tailpipe, and have a fair amount of body damage. That's about it except for routine maintenance.
Probably my most annoying breakage was the little plastic piece inside the automatic transmission shifter. Probably wore it out from all the constant shifting offroad. It broke in the middle of nowhere in Moab, and our whole group could not figure out why my Jeep was stuck in park. We thought the transmission was locked up. JayDub finally called a buddy on his cell phone, and got a tip to check that plastic piece. Sure enough that was the problem. In the meantime, we had removed both driveshafts trying to figure out what was going on...
