I chose to replace the belt idler pulley as well as the belt. I also decided to take a few extra minutes to clean the air chute and fan, so I replace those foam gaskets at the same time. If I was doing the repair again, I think I would order the plastic retainers for the drum support rollers, so that I could have removed them to clean the shafts as well. On such an old machine it would be impossible to remove those plastic retainers without snapping them. Appliance Parts Pros has all this in stock. A 6 in 1 screwdriver was all I needed, as it had the proper size nutdriver as part of the shaft. The longest part of the job was cleaning everything on this 30 year old dryer. Sounds like new again.