One of the support rollers had totally disintegrated. Since we had to disassemble the dryer, we chose to replace all rollers and the belt. Once that was complete, it runs great!
Our dryer was a little different in details to the videos on AppliancePartPros.com, but using the website helped diagnose the problem and the video made a huge positive difference it getting it fixed the first time. It took right at 2 hours start to finish. We saved several hundred dollars compared to calling in a service technician.