Reply to "twitchy, nervous steering on unsmooth roads"

Thanks for the responses. It has the frame brace from an after market vendor already. I'd like to have the seam welding done, but really hate to ruin the paint and not sure how that would could be done without toasting at least a wire or two, os that'll be a much later project.

The rear is in alignment, per that fancy digital expensive alignment tool. The caster is maxed out already and the bump steer kit is installed, but as per previous bump steer tech articles, some bump steer remains.

It has original rims with very low profile front tires and close to original profile rear tires. I'm changing the tires and rim set up next so the width of the sidewall will be near equal on all four tires. Hopefull that will help a lot.

The lower front ball joints were looser than the front at the time of rebilding the a-arm bushings last summer, not out of spec or overly loose.

I hope the new tires and rims, along with a more firmly planted nose at speed keeps the 1/8" steering wheel shimmy out on the roads grooved for rainwater drainagle, like parts of the freeways around here. No shimmy on some stretches and nervous steering wheel on other parts of the same freeway. Consistent. Just annoying. When I see the inside camera view of Michael Shumacher's Ferrari, is it pretty tight steering, while the same camera angle shows that Juan Pablo Montoya's steering wheel is much more jittery. Maybe different caster settings, like you said. It seems to give reassurance when the steering wheel is tight and not shacking so quickly and tightly. I suppose I'll change one thing at a time as the wallet allows, and just get used to it. I'd like those new front a-arms as an upgrade. That sounds like it would be the biggest help, with a reasonable price tag.

Thanks again.