The drum glides (also called slides) might be worn out. The drum glides are small plastic pieces that support the front of the dryer drum. As the drum rotates, it slides on these plastic pieces. Over time, the drum glides wear out. If the drum glides are worn out, the dryer will make noise. To determine if the drum glides are worn out, inspect them for wear. If one or more glides are worn out, replace all of the glides as a set.