Maytag dryer over 17 years old. Never had a problem so I figured that I would try to fix it because nothing now is made like it used to be. I initially replaced both rollers and belt. None needed to be replaced because I still had the thumping sound. I called the help line and dealt with a tech. This person, I regretfully forgot his name, was extremely knowledgeable and helpful. We both went through the work that I already performed in DETAIL and he went beyond what I was expecting helping me. We both agreed on replacing the felt because there was no other reason for my machine to be thumping. I received the felt in two days and changed it out. Thumping is NO MORE!! Thank you very much. Highly recommend AppliancePartsPros.com. Excellent customer service and very fast shipping