It's ball joint time, starting to feel some movement... mechanic estimates 10 - 20 mil movement of upper ball joint. I have been feeling increased "wander" or "rut following" behavior on the highways... car has 100,000 km on it. Are there any improved (stronger / heavy duty) or aftermarket suspension parts for our S's yet? My mechanic noticed the front upper ball joints are riveted onto the upper control arm.. and theorized it might be possible to drill them off and replace with some other ball joint. Like maybe something for a 3/4 ton truck ? Anybody gotten adventurous with suspension mods yet... I'm off warranty so what the heck. Not afraid to do stuff in a machine shop.