GE Adora washer drum unsecure?

I have a GE Adora washing machine that needs to be looked at. It started a few days ago. When the drum rotates, at a specific spot in the rotation, the drum shifts forward towards the door and rubs to make a loud squealing sound. I don’t know I there are rollers inside of the sealed drum or if its slipping off of then or what. Anyone have any ideas? I’m pretty handy around the house so if anyone has a suggestion, I won’t be scared to jump on it.

Also, made a quick video to show the problem a little better: http://youtu.be/HWf540PAAWY

Remove the rear panel and make sure the drum pulley nut (#323 at the [B]diagram[/B]) is tighten properly.

Here are the breakdown diagrams and http://www.appliancepartspros.com/parts-for-ge-whdvh626f0ww.html

Gene.