My 2006 Honda Ridgeline has alot of vibration.

My 2006 honda ridgeline has alot of vibration coming from the front end this is not a constant problem. It does it mostly on the irregularity on the road. My mechanic advisor told me to change the front sway bars bushings but there is still the same vibration and noise like a "klunk" beneath-center of the lower body. Any suggestions? Thanks!