Loud squeking noise as drum turned

I was somewhat intimidated by the fact that dryers are all repaired from the front. Pulling out the drum seemed scary at first, but that turned out to be very easy. After removing the front panel and lint shroud it is easy to reach the idler pulley and take the tension off the belt. If you're going to replace the rollers which is generally the cause of the noise, get new retaining wrings and a decent pair of pliers for them. The rings can lose all their spring easily by strechting them too far to get them off. Replace the idler pulley and belt while you have the dryer apart. Vacuum all the lint out of there and you're good to go.