One problem related to driveshaft has been reported for the 2012 Jeep Wrangler. The most recently reported issues are listed below.
Purchase date Jeep 7/2014 east hills Chrysler east hills NY. Upon driving the vehicle home. I noticed it had the rear seat belt ripped out, parking brake was defective and a nail in right passenger side tire. I brought the vehicle back and stated "how was vehicle past a safety inspection"? their was response was the "sorry". The car was advertised a pre-certified based on the a 100 point inspection, which it never had. They replaced the seat belt that night. 5/4/2015, driving home the real differential failed (miles 48806) both front and rear were leaking. I was driving at rate 50 mph. The chain of events of the failure affected the flange and yolk off the drive shaft. I took it back to east hills Chrysler. The power train warranty covered this repair however, during the failure, I could not shift to slow the vehicle, I had a lot of vibration in on the manual stick. I expressively asked the dealer to inspect the clutch, gear box and transmission for damage as a result from the of the differential failure. They said they would. The car was at the dealer ship for 2 weeks. Drove the car home and heard this whining sound from the clutch, brought it back the same day and explained to them what the issue was. The noise was and is the through out bearing. Appointment date 6/2/2015. The car was there for 2 weeks. Result, the tech said the noise was normal. The clutch was not under warranty, and the could no guarantee, the noise would go away. Again I explained it the clutch damage was as a result of the differential failing. Dealer ship stated that the clutch was fine next appointment 7/17/2015 - dealer states that the noise in the through out bearing of I told expressed to them. My concern aside from the repair cost is the safety of the people who place their trust in experts to fix and maintain the vehicles that being sold and misrepresented as safe.