NHTSA Complaint #11431132 — 2016 JEEP CHEROKEE

My 2016 Jeep Cherokee with 42100 miles on it locked up much like a brake locking up. The auto park brake feature is always applied when parked and has always worked fine until now. My wife was pulling out of the garage had just started to back up and the Jeep would not move. I was in the house she came inside and told me her issue with the Jeep. I went out and tried it, and had the same issue. I put it in reverse and tried to give it some more gas.. Jeep lurched some like the brakes were locked. Had no brake light though. I turned the engine off and restarted, made sure the brake light was out.. same thing.. I gave it more gas this time and something gave. I took it for a 30 mile drive.. it was on a Sunday, no shops open to talk to about it. On the 30 mile drive I had no issues even after stopping and restarting several times. Monday I called the service department where we purchased the Jeep. They said a two month wait to get it in. I called another dealer he said he could look at it but if it has no issues for me and he had no issues nothing he could do. So now my wife who is suppose to drive 350 miles to watch some of our Grandkids for a month while our Daughter is recovering from surgery is afraid to drive her Jeep. If I drive it and it has issues while she is out of town leaving me stranded on the side of the road.. It will be a big hassle. I do have the MOPAR extended lifetime warranty.. but if they cannot duplicate the issue at a service department they can't fix it.. what to do?