YES! I was just about to post the same question. With all the snow here in the Chicago area lately, I've been using the 4WD on my 2015 Armada a bit. I really only use it when it's snowing, so probably a few times a year, and maybe 5 miles at a time. When I get home I usually switch back to 2WD and then turn the car off. I've noticed a bit of a "jerking" when switching over to 4WD sometimes, maybe once or twice during the first block of driving, then it usually smooths out. But the issue I noticed the other day was while driving on the expressway around 60-70 mph, I felt a quick jerk, kind of like a slip or quick deceleration, then back to normal. This happened about 5 times during about 100 miles round trip. It only happened while on the expressway and I had used 4WD the evening before. I was in 2WD when the issue happened. I'm wondering if the recent switch in and out of 4WD might have caused some kind of transmission issue where it was stuck or adjusting to switching back to 2WD? Anyone ever experience anything like this?
2015 Armada SV 4 x 4 - Brilliant Silver
Tinley Park, IL