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Jeep set up with a track bar or panhard bar for the rover guys. Panhard controls side to side, radius arm to control rotation of the axle. Jeeps knock off of the defender front suspension.

Problem with radius arm suspensions is that they turn the axle housing into a sway bar. As the suspension cycles, the housing is twisted.

If youre looking for a little more flex, why not try Johnny Joints where the radius arm meets the frame to give a little more movement? Ive also ridden in a truck with wristed arms and found them to work pretty well. Gave the axle a little more movement. Still not ideal but not too bad.

 

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Defender, Disco and Rangie front suspension is basically a 3 link front end to begin with. The rear is a triangulated 3 link. Are you looking for more flex from the front axle? Easy to get more flex but handling at speed suffers.

I thought the rear was closer to a triangulated 4 since the A frame attaches to both frame rails and meets at the axle. A three link rear would be two lowers and a single upper link.

Also, I didnt know radius arms made for a 3 link suspension?

 

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No it's a roll axis issue..

Thats exactly what it was. The upper link was almost in the same plane as the lower links and in the center of the axle. It gave no pinion angle control and rolled like crazy. It had Fox shocks on it that were valved for the job. It was just not a very good design. It was beyond chopping up too, the way it was set up. I rode in an early Bronco with wristed radius arms in the front. Was far more stable on the rode and still flexed up like crazy. Also control pinion angle throughout droop and compression far better.

 

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What happened then?
:confused

I found it to be very unstable. It flexed up great. Incredible even but there wasnt much pinion control when it did flex up. The 3rd link wasnt to the pinion, like you would see normally, but to that box section between the lower arm mounts. There wasnt much separation either so there was a good amount of roll in corners and under braking, mine dove pretty hard (as well as being squirrely). It might be different on a lighter weight D90 but on the D1, it was scary.

OP, do your research. Know what is good and what is not. Then, if you dont want to do it yourself, find a good shop to do it for you. Then, pepper them with questions. Suspension is too important to gamble on.

 

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Engine, and handling.

You wont find many 3 link front set ups due to the engine being right in the way and hi speed handling would be another issue.

google 4 link suspension. lots of stuff

4 link is even harder. Go to Pirate and look it up. There are a couple in the LR section running 3 links. People do 3 links because of packaging and space issues. 4 links are done in the rear because there is just more room to work with. 3 links can be stable and handle well BUT they require a lot of tweaking to make so. Dont bother with the bolt on SG one. Its scary.