This happened suddenly, put a load in and started it up and it sounds like a Model T. It doesn't shake or vibrate excessively, just a loud rattling noise. My son cleaned the lint trap before starting and the top of the dryer gets a lot of junk stacked on it so it is not impossible that something fell in to the lint trap recess but that's just for informational purposes. Any thoughts? Here is a link to a video with the sound: https://drive.google.com/file/d/1cYUHgZlwFHL7ZiSbbUjpWsn83ZV7Osou/view?usp=sharing Thanks.