Originally Posted by addicted2dunes
have you ever built a radius setup?
Ever driven one that was not factory engineered?
Nearly every day for well over a decade.
I am telling him all of this from experience, not just "I thinks"
Maybe you should
think. If your radius arm suspension doesn't handle well on the road, you designed it poorly or implemented it poorly. Radius arms handle very well on the road, which is why they've been around since the dawn of cars and continue to be used on factory and custom vehicles.
The longer the radius arm, the less caster change you'll experience through the cycling of the suspension. At 48", your arms are significantly longer than most factory-designed radius arms, and therefore have less caster change than most factory-designed radius arms. We'd need to know more about your setup to be able to fix it.
Originally Posted by cherokeemudman0
my arms are 46" eye to eye. i did cut the c's on my axle and rotate them 12 deg and then set the caster at 7deg at ride height. what is the best joint for the trac bar at both end since im going to make it. heim joints, johnny joints or?
"Best" is a tough term to work with. It doesn't mean the same thing to everyone. For example, a simple heim will allow for more misalignment than a bushing, but it's also more expensive, will wear out sooner, and will transmit a lot more vibration. Bushings are cheap, easy to work with, and will have the least vibration transfer, but it's gonna bind a little. Johnny Joints are a little more expensive, but combine the best parts of bushings and rod ends. They're quite large, though, and can sometimes cause space issues if things are real tight.
Realistically, it won't really matter what you use once you remove that one upper link. I've had radius arm setups using bushings at both ends of the track bar that would max out 14" shocks with plenty of articulation left to go. That was on narrow early bronco stuff, too. If I were you, I'd pull that upper link and do your full articulation test again. I bet you'll be maxing out your shocks right there and can leave everything else as is.