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Old 02-03-2004, 12:10 AM
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4 link suspension??

i was wondering if anyone knew a right way to build your own 4 link suspension. i am swaping out 3/4 ton for 1/2 ton and i am using coil instead of the original leaf springs to lower it down.

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Old 02-03-2004, 06:20 AM
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I have done some pretty exhaustive research on 4 link suspensions and, if that is the route you want to go, you will be much better off in the long run to just purchase an aftermarket suspension kit.
I say this because, if you don't have the background to develope the suspension points correctly, you will end up with an ill handling beast. Plus, if you haven't done any cost workups, you will spend just as much to gather the components individually as it does to just buy a kit... And you still need to design and build it. Rod ends are expensive and they wear out and will need to be replaced if you do a lot of street driving. The poly bushed units are the way to go for a street driver anyway so your final purchase should have those at both ends of ALL of the bars. Longitudinals and panhard.
There are a ton of aftermarket guys out there building these things. Here are a few sites...
http://www.suicidedoors.com/products/4linkkits.htm
http://www.airride.com/producttoc.asp
These two are pretty good. I would recommend the 1st site.
Big bars. Big end links. Well suited to a big truck and street driving.
Stay away from the "Race Car" style suspensions as they are not designed to live under the banging and bashing a real world vehicle will see. You really have to ask yourself what is the real intention for your suspension. Drag racing? Street driving? Cruising?
If this is a street truck I would recommend staying with your leaf springs and putting in dropped hangers and shackles. Much less expensive, much less maintenance intensive and much easier to install.
This is the way I am going with my Astro van. Dropped leafs on a narrowed rear subframe and my own design traction bars. It'll work great and I will not have to worry about rod ends wearing out or rattling.
Mark
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