The symptom was lint everywhere in the laundry room and longer drying times. replaced front and rear drum seals and bushings, while open replaced drum rollers and belt, cleaned all components of dust/lint, oiled belt tension roller, and buttoned it back up. I bought this Kenmore new in 1979 and keeping it going still. only wish I could get a new timer knob. all the parts were right and high quality, the only hitch was the drum seals did not include instructions and the front is trimmed to fit as shown in the video but a quick glimpse of the instructions showed multiple cut lengths and how to determine which to use but not clear enough to read. I tried the chat option to see if there was a pdf available as I saw no reference on the website. I got no response on a Sunday after 30 minutes, so I just measured 3 times and cut once matching the front drum bearing to the old one. This was my first time for drum seal replacement so took a little more time since no instruction sheet for specs but it all works. thankful the video mentioned drying time for the glue used on the seals.
Please consider adding a pdf file for instruction sheets on each part page so when the parts come in factory-sealed bags without them (although pic on the parts page shows them in the bag) they can be accessed to allow proper fitment of parts.