NHTSA Complaint #11508865 — 2021 JEEP GRAND CHEROKEE

We were stopped for redlight at busy multilane intersection, light turned green, went to accelerate vehicle revved to over 3000 rpms but would not shift out of first gear, got to side of road put vehicle in neutral and then back into drive and was able to proceed. Took vehicle to Chrysler Jeep Dodge dealer service center after doing diagnostic they did computer update; they then got a diagnostic code to replace transfer case. The vehicle did this again about 3 months later took it to dealer they did diagnostic unable to find anything. Vehicle did it again about 2 weeks later took it to dealer and they performed a computer update. This is a very dangerous situation when vehicle will only barely move at busy intersections, and you are in a middle lane and can't get into and outside lane and off the road in a timely manner. When this happened the first time the vehicle only had a bit over 10,000 miles on it, it currently has slightly over 12,000 miles on it. This problem is intermittent, and the dealer has not been able to replicate it. Anytime that it happened there were no light indicators on dash.