Are you sure the springs are seated correctly, in relation to the "rubber" seating pad? A half turn (or less) off, and they will get noisy. Make sure that rubber is seated correctly, and the spring on it. Look at it hard, you'll see there is only one correct position. My rear can get a bit clunky over sharp bumps, or multiple small ones. In my case, it is as much the spare/rear door as anything else. Good luck...you'll get it.