1995 fzj80 aka "Marshmallow" - 4-link front, 5" lift, 36" km2s

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nukegoat

Should have bought a Jeep
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Apr 10, 2013
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Location
San Jose, CA
I finally got some time to take some poser shots of my (factory locked, since everyone will ask) fzj80. I bought it in march, fixed a bunch of stupid issues (no heating/ac, radio didn't work right, added CDL switch, pin 7 mod, new a/c condensor, new head gasket, blah blah blah) and then started hackin away on it.

I threw some White Knuckle Off Road sliders on it, which are fantastic. John from WKOR is one of the best people I've dealt with in the 4-wheeling community for parts. Next was extended brake lines and springs - just lifted it up and removed the front driveshaft so I could get an idea of where it would sit. I chose 5" TJM coils which netted out to around 6" of lift. I special ordered some 345/75R16 KM2s which took forever for tirerack to get to me, but those showed up while I was noodling out the math to do a semi-parallel 4-link for the front.

My 4-link front is similar to the 4-link in the rear, or a 4-link in the front of a TJ wrangler. Still uses the track bar but retains my front swaybar as well. I don't have any great pics of the mounting / links, but I did take these pics with my cell last night.

Still working out some kinks in the front end - wheel bearings are pretty much shot and I want to re-gear and swap in the longfields I picked up a while back. I also want to work out a stiffer swaybar somehow, which sort of negates the purpose of retaining the stock one, but oh well.

I have not taken it offroad since linking/lifting it. In these pictures, which sort of don't do it justice, the right rear tire was about 32" off the ground. My front shocks prevented the front from drooping any further (doetsch tech 8385/8386's) but the links weren't binding. I need to add wheel spacers since the front tires can hit the upper coil buckets when stuffing.








The goal was to design a system that could theoretically "bolt on" to the axle in the stock locations and onto the frame. While I'd like to design these things up and get some plates water-jetted, I need to see if I can improve the body roll to a point where I think people would be happy with the results. Otherwise, this design is relegated to a slightly more road-friendly red-headed stepchild in the world of the 3-links where it works great off-road but wouldn't satisfy 95% of people on this forum who still have a strong need for on-road performance. This probably explains the lack of solutions from any major vendors to-date (though *everyone* claims to be "working on it").

It would be cool to partner up with some people on this board to come up with a way to design a front-mounted sway bar. Everyone has the same idea (which is a good one - to use a splined sway bar with a lockout hub and mount it in the front) but I guess nobody's taken the time to design and build something.
 
Looks good

Where is your front DS?

But, we need pictures of the real goods underneath please
 
Looks good

Where is your front DS?

But, we need pictures of the real goods underneath please

I need to finish grinding off the old radius arm mount on the passenger side and get the driveshaft installed as well as figure out the swaybar extensions (I collapsed the 1/16" wall rectangular 1x2s when flexing it out). Then you can see it all together.

And ye olde driveshaft is on its way from Salt Lake City. Supposed to arrive tomorrow. I went with Tatton - lots of good reviews from the Jeep guys. Uses spicer 1310s in the CV, which is fine for a front DS, IMO.
 
Heard good things about Tatton shafts

very reasonably priced to
 
Interesting... Can't wait to see pics! I made a custom 1310 cv for the front of mine and has been holding up well
 
Interesting... Can't wait to see pics! I made a custom 1310 cv for the front of mine and has been holding up well

Yeah, it seemed to work fine. Rear pinion yoke is getting abused a bit, though... eek

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I can appreciate your engenuity, but what's wrong with just doing the "hitch pin" mod and using long enough shocks to suffice? The factory links have the ability to flex the truck if you free one of 'em up. Plus it drives stock when you put the bolt back in. Just a thought.

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I can appreciate your engenuity, but what's wrong with just doing the "hitch pin" mod and using long enough shocks to suffice? The factory links have the ability to flex the truck if you free one of 'em up. Plus it drives stock when you put the bolt back in. Just a thought.

Because that puts the thin stock brackets under more torque, and more prone to cracking
 
Of course I welded reinforcements on them. :confused:

How does it handle on steep downhill climbs?

And great work OP! Love to see folks think outside of the box.
 
I can appreciate your engenuity, but what's wrong with just doing the "hitch pin" mod and using long enough shocks to suffice? The factory links have the ability to flex the truck if you free one of 'em up. Plus it drives stock when you put the bolt back in. Just a thought.

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a bunch of reasons.
1. i needed to correct caster anyway.
2. the factory arms hit the tie rod when running my lift with correct caster.
3. the factory brackets would need reinforcing
4. the anti-dive is pretty terrible at my lift height with the stock geometry
5. it loads everything awkwardly to have a single offset 'link' (the passenger front radius arm mount) with only 7" of separation doing all the axle control. Just seems wrong in an engineering sense. Probably fine since lots of people do it but I'm not convinced its smart.
 
How does it handle on steep downhill climbs?

And great work OP! Love to see folks think outside of the box.

Thanks, man! I just saw your build thread. Very nice. You guys should let me know next time you plan to hit up Hollister. Im getting sick of it but am down to play tour guide at least...
 
Wow truck is looking REALLY good. i like the 4-link idea while still being able to keep the factory swaybar. keep up the good work! im looking into solutions to get more flex and still retain good on-road manners...like everyone else.
 
Nice looking rig. Any close ups of the 4 link? Doesn't really look to be flexing any more than a factory setup lifted. ?? Shocks still hanging it up?
 
Rugged looking truck.. Makes me want to get a second one in white!
 

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