2018 Expedition Limited, 59,950 miles. Not a lick of trouble from this truck since new. This 3-4 second rattling on cold start problem started around 55,000 miles. Annoying but I didn't give it much thought until I read about it here. Since powertrain warranty was literally a few miles from expiring, rushed to dealer to demonstrate with a video. They wanted to hear in-person so I left it overnight for a morning cold-start. Next day, problem confirmed, parts ordered, should have it back by Friday afternoon, Monday at the latest. Free. Can't post on the result yet, but the customer service so far has been great. I'm trading this on a 2022 that I'm ordering in the Fall, but I figured if I could get it fixed under the powertrain warranty, why not? Just under the wire (that never happens)! Anyway, shout out to my dealer, Hoffman Ford in Harrisburg, PA who serves customers very well. And thank you to you guys for posting details in this forum.