I have one of the original Maytag Neptune dryers from their first year on the market, model MDE3000AYW. Similar to another post I read it makes a loud screeching sound when we start a load. It usually settles down to a quiet but audible and continuous level in a minute. Is likely to be the glides? The tumbler? How many of each are needed? A video I watched seemed to say there are 2 but my parts manual shows 1. Thanks for your help