One problem related to steering gear box shaft pitman has been reported for the 2012 Jeep Wrangler. The most recently reported issues are listed below.
Joint between pitman arm and tie rod failed, leaving no steering while going down the highway at 70 mph in a straight-away. Under many circumstances this could have lead to a deadly crash. There was no forewarning of pending joint failure (no noise, vibration, sloppy steering, etc). Vehicle was serviced several times in the preceding 3 months. No mechanics observed wear of this joint. 105k miles on vehicle.