I realize I am late to the game here, but I am restoring a 2002 3.8L convertible that is having the steering wheel shake at higher mph. I have already replaced many critical suspension parts, including shocks/struts, caster camber plates, springs, control arms and sway bar links. Always had professional mechanic check the work, align and rebalance after the work was complete. I have the wheels off right now and cant seem to locate the washers you are referring to - any chance you or anyone...

Steering wheel shake issue