I have a 1999 4wd 4-door and am getting a popping-clunking noise at low speed whenever I hit a bump out of the front end, driver side. It does not make the noise at highway speed. It may be louder or occur more often when making a left turn. It has new shocks and I thought that they might be loose and I went ahead and tightened them up. That seemed to stop the noise but it is back and everything is tight. Any ideas?