Originally the dryer was squeaking a lot, so I purchased a new belt tensioner, but the original tensioner was an old-style no wheel tensioner, so that wasn't the source of the squeaking.
I saw a lot of lint had built up inside the unit where there shouldn't have been that much. So I viewed a few videos on the Appliance Pros site and saw that the rear wheel guides were the cause of the squeaking and the rear felt drum and blower housing seal needed to be replaced. The rear blower housing was very easy (watch video), the new felt drum seal was another story. I saw a post where someone said they used clamps to hold the felt in place due to the fact that the felt needs to be stretched. I dry fitted the felt with clamps and saw just how tight it was. I removed the felt and applied the adhesive as shown in the video. The problem is you need to work fast so I had a little trouble with the last 12-18 inches since I was clamping sections so it wouldn't pull off as I stretched the felt into place. If I was to do it again I would not apply the adhesive to the last 12-18 inches until I got the felt in place and clamped, then apply adhesive to last section and stretch the felt in place.
The adhesive sets up pretty quick.
The replacement of the tensioner, rear roller guides, drum belt and light bulb were just as shown in the videos.
If it wasn't for the Appliance Pros site I would have went out and purchased a new dryer. So for a little less the $100 the dryer is running like new and clothes are dry at the end of all runs so far.