My mileage is about 4K…and that was the first time I experienced the hard shift /clunk with such intensity. It sounded like a car hit me or like someone took a shovel and hit the bed of the truck …I’ve experienced sport shifting programs that are real neck jerkers —-this was different. It was an abrupt impact not really a driveline shudder …This just happened to me a few hours ago going around a 10mph blind corner store n my neighborhood. Thought I had somehow picked up a (big) rock that was thrown at the underbody but there was nothing there.
Time will tell —but if it keeps making these noises —I can’t imagine the transmission or whatever part of the drivetrain is experiencing these events …eventually something will break …btw my gen 3 has only done it once.