8/21/23. After the local Infinity service and repair shop flushed and changed the transmission fluid in our QX56, 5 miles later the truck is stuck in 4WD and is very jerky (undrivable). We had the vehicle towed back to the dealership and we awaiting their diagnosis.
Sorry you are having this difficulty. For best help here, suggest to continue keep Car Talk Forums informed of the progress towards a solution. At this point, many possibilities. The symptom may not be related to the transmission fluid replacement work, just a coincidence.
Suggest to post miles, engine/transmission configuration, and transmission work history. e.g. was this the first time the trans fluid was replaced? Was the transmission pan removed? Was the transmission filter replaced? (Note: Questions may not apply to your particular car’s configuration.)