At speeds of 60 to 70mph and rough roads the front left tire will bounce like a basketball. This is not a shimey or wobble. I have replaced the shocks, had the tires balanced and it seemed to work for a while. But now this bouncing is back and is worse than before. The truck is a 1996 4X4, AT, and it is stock issue with 100k on it. I have checked the under carriage and running gear and everything seems to be sound and tight. I have searched the forums and only found shimey and wobble problems that were posted a year ago. So if there is anyone that can help resolve this problem it would be appreciated.