I had the same problem with mine. it clunked real bad when i had someone in the back seat. back your car up on ramps , slide under and look at the end's of the sway bar . there is a big rubber bushing at the end of the sway bar and a pcs that goes thru the middle of the bushing that attaches to the stut. it will be quit noticable if the bushing is missing , the pcs that attaches to the strut will be floating in the middle of a big ring where the bushing was.
the clunking is the pcs banging around in the ring. you can buy just the end's . you don't have to replace the sway bar.
The reason why it clunkes so bad when someone is in the back seat .Is the suspension move's alot more than if you where by your self .
