Ordered the rollers, idler pulley, belt kit. Disassembled dryer after receiving parts. Found idler pulley had a 1/4" deep grove worn in it from the belt and was evidently scraping on something. Also, the rear felt seal on drum had come off and drum was scraping on cabinet. Got some hi-temp adhesive and re-installed felt seal. Replaced the 4 drum rollers and clips, idler pulley and clip and belt. Hardest part was getting belt back on motor and idler pulleys. Not much room to work. Vacuumed out inside of dryer. Had to buy different belt than supplied with kit, but still cheaper than buying all the parts separately. Now have a quiet running dryer. This was a Whirlpool Cabrio dryer. Pros repair video was very helpful.