I think my problem has gone to finding out that I think that it is the center bearing that is loose. Here is the problem:
http://www.e30tech.com/forum/viewtopic.php?t=1994

Here is someone else who I think has the same problem, just the part where he didn't tighten down the center bearing:
http://www.e30tech.com/forum/viewtopic.php?t=261

Help!!!