I disassembled the dryer and found out the rollers were worn, which caused the bumping sound. I looked on the computer to find the parts I needed to fix my problem. I found a site which sold appliance parts, (Appliance Parts Pros) I found the parts I needed by using the dryer model. I ordered the parts and in less than two days I got my parts. I also checked the belt which had a crack in it so I ordered one also. Dyer works fine. Also the video was a great help. Thanks so much.