Originally Posted by
fredswain
There's not a bad ball diff out there anymore. There are lots of people that don't know how to build or adjust them though.
TLR had an issue with the male outdrives in some of the 4.0 kits. The bearing wouldn't seat far enough, and it makes it so the diff doesn't work correctly. But yeah, lots of people don't understand how to build and adjust ball diffs.