I have GE dryer Model # DBB3300ea1ww. I replaced the drum bearing and the belt and still have a loud noise that seems to be metal to metal especially when there is load. Not so much when just running empty.

Fixed the noise. Seems there is a front drum bearing which was wore out. It is attached to the front panel and has 4 slide pads. I noticed that 2 slide pads were missing and the drum was actually eating into the bearing panel The other 2 slides were badly worn. Replaced Front Drum Bearing panel and 4 slides for $50 and about 20 minutes of labor.

Congratulations. Gives you a feeling of accomplishment doesn't it.