On our 1996 3.4 the harmonic balancer appears to have a slight wobble. I am not sure if it is an optical illusion from being dirty, like a tire that is clean except for one or two spots when it spins can look like it has a crazy wobble. If it is indeed wobbling is it about to break, or can a slight wooble be normal?

 

If it does have a wobble then its possible that its on the way out, there shouldn`t be any wobble when its turning, so check it out and if its bad replace it.