This website helped me a lot.http://www.repairclinic.com/0088_8_1.asp#Level1_7
I clicked on what was wrong, found a diagram of my dryers model, and opened it up. Its really not hard to see what wrong. Once you do, find the tools and parts you need and get to work.
My culprit was a bad drum roller. So I found 2 on Ebay for a $10 and picked up some ring Snap-Ring Pliers at home depot (harborfreight.com had them for $3.00!) http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=3316