Loud thumping noise while dryer was on

Unplugged dryer. Removed two screws and removed front of dryer disconnecting the wires from the front. Removed 4 screws and blue wire allowing the me to take the shroud off. Removed blower fan cover by taking out the screws and pulling down. Used pliers to take off clamp on blower fan and then had to use snap ring pliers to remove snap ring. Pulled blower fan off, replaced with new and put back on snap ring and clamp. Reinstalled blower cover, Removed drum by cutting belt (noted the direction of the belt around the idler pulley). Replaced belt (decided since I was going to be in the dryer and it is 14 years old I would replace belt as well) and drum. Reinstalled shroud and front cover. Dryer is very very quiet now.