Dryer starts out fine,after it warms up , makes a terrible rattling noise
It will most likely be the drum rollers in the rear. You would have to take the front off, and then remove the drum to get to them. If you decided to make the repair, replace the belt, and the idler pully, while you are there. Just to be sure it is the bearings, turn the dryer on, for a minute and then just it off. If you hear the noise for a few seconds after the dryer shuts off, you could have a broken blower wheel. Tom ApplianceEducator.com