How to Troubleshoot & Replace Whirlpool AP6013154 / WP8547168 Dryer Drive Belt

Ordered replacement parts on Sunday afternoon and they were delivered Wednesday morning. I already had the dryer apart and installation was a breeze. The installation videos are very helpful when repairing something that you never have worked on before. This is the second time that I have ordered from Appliance Part Pros and have been very satisfied with them 

Called and spoke to one of your service reps..he was very patient with me and told me the problems it could possibly be..I was able to pick the one that sounded most likely needed fixing..after watching the fix it video, my dryer is working again! Thank you to that service rep!! 

Thought it was the drum idler pulley or possibly a drum idler. After looking up the idler pulley part I seen there was a how to video and it also explained some symptoms. That was a big help in the part ordering.