Plastic glide surfaces were worn through. Upper support was ‘paper thin’ in spots too. I replaced the sleeve as a precaution, since the drum obviously wasn’t spinning squarely for a while. Upon tear down, the sleeve could have been reused but what the heck. If you do replace the sleeve, ORDER the o-ring keeper too, else you’ll be going to a box box store at 8:30.... Be sure to have a vacuum to clean out the insides if all the lint. There will be lint. New felt is a must too. If the glides/support are trash, the felt is right behind. On the inside surface of the front panel, the lower ducting is bonded to it with double side foam tape. Airflow, heat plus time...good thing I had aluminum tape to reseal it all before reassembly. Don’t use duct tape. It won’t take the heat. For all this, I did not replace the belt. Upon reflection, since I was in there, I should have done it anyway. Next time?