We researched the issue on the internet and thought that the noise was due to the drum support roller but also noted recommendations to replace the idler pulley and drum belt at the same time. We viewed the you tube videos and followed the guidance. The repair took about one hour (less then originally planned). The hardest part was putting the drum back into the dryer and running the belt back through the idler pulley. We are so glad the issue occurred as there was a tremendous amount of dust inside the dryer which was a potential fire hazard.