Warranty repair of some sort. Overworked, underpaid mechanic at the end of a 18 hour "factory warranty" job, he got paid 9 hours for, forgot to tighten.
Made me laugh when you said Chrysler wouldn't put out crap like this. You don't know Chrysler and this isn't your mom and dad's Jeep. Because those were far superior. Today's today's b******* Jeep