wife has a 2015 we bought with 15 miles on it. Worst car we have ever owned. We get a new car about every 3 years, and we are trying to get out of this one now. Has about 10k miles on it now and has a new trans and rear axel. Our friend has one and has the same problem. Jeep released them knowing that the transmissions were terrible. We have had 5 recalls and software updates all the time.
here is a news report dealing with it. It is pretty big news.
http://www.wsbtv.com/news/local/jeep-cherokee-owners-frustrated-transmission-probl/27012503
My used car dealership client will flat out tell you "Jeep has the worst transmissions on the market".