One problem related to transmission slip out of gear has been reported for the 2014 Jeep Wrangler. The most recently reported issues are listed below.
Malfunction indicator light comes on repeatedly. Implausible data reported from a module that the dealership claims is not even in the vehicle. Occasionally the vehicle will not go above about 1800 rpm and 15 miles an hour. At other times the rpms will surge up into the 5000-6000 range and not shift out of 1st gear. Dealerships claim there are no problems but the shifting problem continues to occur and the malfunction indicator light keeps coming on.