I have a 2015 JK with about 7200 miles on it. It has a problem with not shifting out of first gear. About 4 different times I have been at a complete stop and when accelerating from the stop the transmission will not shift out of first gear. I have been in traffic when this would happen so I would shift into neutral and rev the engine a bit up and let it come back down, shift back into gear and see if it then shifted up into second gear after acceleration. This has worked 3 of the 4 times and the other time I had to come to a stop, shift to park, then shift in gear and proceed. I had to do this twice in a row to get it to work properly. Each time everything went back to normal afterword but I put it in the shop to see what they could do. It was still under warnetee and they had a builiton on it and did a software update, e flash software 2 software flash for TCM 181905ar module, TCM reprogram 5659WPJ TCM updated from 05150891ad to 68271728aa I will post more if this continues to be an issue.