First I researched on the internet what the cause of the problem might be and found out about the idler roller and the drum roller bearing could be bad. I found out that the type of bearing used can dry out over time and start to make noise. The bearing are made of a powdered metal that is compressed under high pressure and temperature to form the bearing shape. This leaves about 20 percent of the metal open in a porous state that is filled with oil in a vacuum process. The oil comes out of the metal and lubricates the bearing when it is under pressure and under higher temperatures. Over time the oil leaves/dries out leaving the bearing dry and the squealing can start. You can't lubricate these bearings unless you can duplicate the vacuum process used at the factory.I did try lubricating them with a small amount of grease on the shafts but the squealing returned in about 3 weeks as the idler tension bearing slung out the grease. I then ordered the rollers. I removed the old drum rollers and idler roller, cleaned the shafts, and installed the rollers with no problem. The squealing was fixed.