Washer makes loud bangs while spins

Video of my washer making banging noise while in spin mode. I have already replaced the driver coupler. I thought it was that issue, but apparently the bad drive coupling was created by this banging problem.
Can someone help me diagnose this before I order a new tranny and other parts I may not need. I am not sure it is a clutch or tranny problem at the moment. There does seem to be oil around the tranny… any help is greatly appreciated.

YouTube - VID 00026

Other video shows me stopping the tub but then I can start it back. I dont think I should be able to do that.

http://www.youtube.com/watch?v=I0Rjhiq7C4E

The likely culprit is the transmission but there may be other problems also. This kind of problem is very difficult to diagnose on a Forum like this because we really need to be there to see and hear exactly what is going on. If you see oil splatters on the inside of the cabinet this is further evidence of a transmission problem.

I would start with replacing the tranmssion and see if that fixes the problem. First, think about whether or not you want to make the repair as opposed to replacing it since it is an expensive part.