Product review (5 stars): Dryer is quieter now, price is good!
This dryer has always made a "thumping" noise when turning. After the belt snapped I took it apart I noticed the groove in the drum where the tires run had rubber build up (transfer from the tires) in places which was causing high spots thus making a thumping noise each time the high spot rolled past a tire (rollers).

Anyways, this kit comes with factory parts and packaging from whirpool along with install instructions at a good price and you get a belt tensioner that has a roller instead of just a smooth metal piece riding on the belt.

Install time will take about 20-30 minutes. Be sure and type the belt part # into the Youtube search bar for a video on how to install.

Thoroughly clean the drum where the tires ride and make sure you have the belt in line with the roller and turn the drum a few times before putting it all back together.

The dryer runs much much much quieter now!