I have a clunking sound coming from the right front area of my 1985 300D when I go over speed bumps. It doesnt seem to be making the sound right when I hit the speed bump under compression, but when the tire is starting to roll down the other side of the speed bump. This only happens at normal speeds. Going slow over the bump or a little fast will not produce the noise. It has been doing this since I bought the car about a year ago. Since then I have replaced many of the front-end parts: wheel bearings, sway bar bushings, upper control arms, shocks, guide rods, lower ball joints, lower control arm bushings, outer tie rods, steering idler bushings, tightened up the steering box, alignment, wheels and tires. I have gone over all of the parts and everything is tight. Any ideas?

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1985 300D 296,000 miles - Project "Rusty" 1/4 mile in 19.9 sec @ 71mph. It's almost rust free and water proof!

2006 Dodge/Cummins 6-Speed - 670HP 1159ft/lbs