Loud screeching noise coming from dryer

After removing the back & top of the dryer,I determined the noise was coming the idler pulley.I went online w/ model # & found Partselect.com.I ordered the dryer repair kit (at my door in 3 days) which included all the rollers,idler pulley, belt & hardware.It was an easy job to do even tho instructions were for top control panel model (mine is a whirlpool duet- front control) I did try using silicone lubricant on idler pulley, which worked to quiet dryer for a couple days so my wife could use it while I was waing for parts.Two thumbs up to Partselect.com,I will be purchasing all my appliance repair parts from them..I own all whirlpool stainless steel appliances that have been very reliable,but it's nice to know I have Partselect to fix problems as needed.