Look at these:
https://dl.dropbox.com/u/8010163/GE%...%20Manuals.zip
What you need to do is to remove the dryer from laundry room and take it apart. When you pull it out from the wall and unplug it you will be able to see what you need to do in order to take it apart. It is not that hard to do. Have dryer on its back to make it easier to get the drum out. The first thing you want to do is to clean out everything very well which means to remove parts that move air and wash them out with soap and water, including door and blower fan. Just vacuum out motor. A rear drum bearing can be causing your problem, but it may have support rollers supporting the drum and an idler/tensioner pulley that has to be greased with white lithium grease, but cheap replacements can be ordered if the bearings are ruined. You always grease bearings in a dryer with white lithium grease, available at any appliance or auto parts store. If the bearing is not scored then you can clean it well and re-grease it put it back in, but if scored, which it probably is, then get a new one that comes in a kit, as it is fairly cheap. You also want to get a belt for the dryer unless you want to do this again in a month or two. It is only about $5.00. Put it all back together and test the drum by rotating by hand to make sure you have it right because many errors can be made in putting it back together. If you have labeled all wires when you took it apart you will have no problems. See:
https://dl.dropbox.com/u/8010163/Ken...%20Manuals.zip
https://dl.dropbox.com/u/8010163/Whirlpool%20Dryers.zip