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01tj
Guest
Make sure you factor in an anti-wrap bar.
Make sure you factor in an anti-wrap bar.
you won't need one with SUA.

Don't want to copy Steve's excessive rant there, but properly set up leaves will out preform a 4 link that isnt set up right.
It's all a matter of taste which setup works best. I know the ride quality is better with a SOA setup than a SUA because in a SOA a flatter spring is used which means more flex, which is why I prefer it. When I started doing some building on the YJ a few years ago, it was setup SUA in the rear. It handled great on the road but when I took it offroad it felt like I had limiting straps set on 1/2" of down travel and riding on bumpstops. I changed to a flipped XJ spring over in the rear and it made a massive difference. I also added a traction bar (anti wrap bar) and it fixed all axle wrap concern.