2003 TJ stock suspension. Just recently started hearing a slight knock when I hit uneven road. Coming from the front driverside area. It sounds like a suspension issue but everything looks shipshape under there. Today I jumped on my door sill and gave her a heavy rock to see if I could hear it while stationary. Nothing. It only seems to act up when I am underway. I can feel it in the pedals if that helps. Ideas?