Five years ago, I fabricated and installed a triangulated 4-link rear suspension on my '29 Hiboy w/'32 frame that was originally built in the 80's, so this was a major upgrade. It worked great until I blew it apart for painting after shaking it out for three months. Since re-assembly, I can feel it bounce and skate through bumpy corners. It's been five years and feels worse every year. Maybe I'm just more sensitive to it.

The suspension geometry duplicates that of the Mustang II, although I raised the forward attachment point of the upper bars slightly to reduce squat on launch (which works well). I also have 180 lb. Carrera coil-overs angled in 20 degrees each at their tops, giving an effective sprint rate of 169 lb. According to an article in Rod & Custom a few years ago, that should be correct for a fiberglass-bodied fender-less car with a small block and auto trans. And it was, initially.

It feels as if it's binding somehow and causing the car to bounce around, but I can't find where, and did not feel so before re-assembly. I've checked and lubed every joint several times, and (if I do say myself) all of the parts dropped into place - nothing was tweaked to get things to line up.

Any thoughts other than binding?