Hi guys my 2020 Palisade HTRAC Limited started doing the dreaded vibration at 65-75 mph. This problem has been discussed extensively on this forum and the Kia Telluride Forum. Well, I took my car into the dealer today (Teton Hyundai in Pocatello Idaho) and they checked the balance of my tires (which were fine), immediately pulled up the TSB and ordered the parts and agreed to change the rear propeller shaft and awd coupling assembly no questions asked. They didn't even test drive the car, they just took my word for it. They are truly a superb dealership. They will call me with an estimate of timing for parts availability and they let me take a picture of the actual TSB bulletin so that I can post it on the forums. Show this to your dealerships, the TSB just came out. Good luck!