This morning I went out to the truck, cranked it up, and got under the front of the truck. When I looked at the crank to see if it was wobbling, I noticed that the harmonic balancer was wobbling by the same amount and in unison with the pulley. I'm starting to get worried that the front bearing is wore out and allowing this to happen. I don't want to rebuild the motor, but at the same time I don't want to lose the crank...Any ideas as to what I should do to stop the wobble