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Unread 06-19-2012, 08:19 PM   #1
rage4order
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Coil suspension conversion on '90 YJ- should I??

I have owned my 90 YJ for almost 20 years now and I just love it. I have 32" tires and a 3.5" suspension lift on it. So, here's my predicament. I have been really thinking about buying a newer model Jeep, probably a 4dr Unlimited and the main reason is the ride. I'm 40+ years old and my 90 rig just is too rough and bouncy on regular road driving. BUT, if I could do a coil suspension conversion, I would gladly hang onto it! My questions are, is a coil conversion kit a good way to go? Would it improve my street ride? Has anyone installed one and if so, how do they like it?

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Unread 06-20-2012, 08:48 AM   #2
crackedcornish
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what brand leaves do you have on it now? Some springs are flexier than others, and a good set of flexy springs will ride nicer on the pavement than some of the stiffer ones

I wheel a YJ 'cuz it's relatively cheap and easy to fix, but if you can afford to wheel a newer Unlimited....I say go for it
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Unread 06-20-2012, 10:10 AM   #3
scubamc
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Going with a coil or coilover suspension will ride better than a leaf suspension. I am running the Polyperformance 3 link kit in the front with coilovers. Genright also has some really nice "kits".
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Unread 06-20-2012, 10:13 AM   #4
1988jeepyj
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Search comments for the coil spring conversion kits, super expensive and people say theyre horrible. I was looking that route for my 1988 but the kits are like $1600 and people have really not recommended them
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Unread 06-20-2012, 10:29 AM   #5
crackedcornish
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if you want to keep you YJ look but move to coils, there is a Hybrid frame available that is set up to use any TJ suspension, stock or aftermarket, under a YJ tub/drivetrain


http://www.throttledownkustoms.com/framesHybrid.html
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Unread 06-20-2012, 10:38 AM   #6
1988jeepyj
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That is cool...
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Unread 06-20-2012, 10:48 AM   #7
scubamc
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Quote:
Originally Posted by 1988jeepyj View Post
That is cool...
But not worth $2500 IMO.
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Unread 06-20-2012, 10:51 AM   #8
1988jeepyj
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Quote:
Originally Posted by scubamc

But not worth $2500 IMO.
Ouch, and it's "starting " at $2500 not including mounts or options. Really gotta love your yj to upgrade this route
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Unread 06-20-2012, 12:02 PM   #9
crackedcornish
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Quote:
Originally Posted by 1988jeepyj View Post
Ouch, and it's "starting " at $2500 not including mounts or options. Really gotta love your yj to upgrade this route
still, it's cheaper than buying that 4 door Unlimited, and gives the OP a chance to keep the YJ that he has owned 20 years and loves

and as far as the motor mounts go, I would look at it as an opportunity to put that small block in...hmmm, anyone else want a Hemi-powered, coil sprung YJ
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Unread 06-21-2012, 01:54 PM   #10
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Well, to start off, my springs are Black Diamond brand that came with my 3.5" lift kit. I have been tempted to start off on the low end(price-wise) and work from there- maybe replace the shocks, then the leafs. One of the main reasons I like my YJ is 1)it's paid for, 2)parts are relatively cheap and easy to find, and 3)if I damage anything it won't hurt as much as damaging a new Unlimited!
I hadn't really thought(or didn't even KNOW) about swapping out my frame. That's a bit beyond my mechanical abilities and patience. I was hoping I could find a fairly simple suspension solution that could possibly smooth out my ride. Are those Black Diamond leafs considered stiff? I will say, my Jeep did seem to get bouncier after I put on the lift kit...but then again, I was replacing 15 year old leafs with 180K miles on 'em!
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Unread 06-21-2012, 02:42 PM   #11
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Maybe buy a flopped over tj and put ur body on it
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Unread 06-21-2012, 02:51 PM   #12
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I honestly think that replacing the springs and shocks with a little higher quality parts is the best way to go. I wouldn't recommend a coil conversion to anyone running the stock front axle or tires under 35". If you want better ride quality and not insane articulation, then call BDS and get a new set of leaf springs comparable in size to what you have. Shocks are a touchy subject but I love my BDS valved Fox shocks. Whether it be highway driving, racing through forest roads or rock crawling, BDS is unparalleled as a multipurpose daily driving/weekend wheeling spring.
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Unread 06-21-2012, 03:01 PM   #13
rage4order
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What brand leafs and shocks would you guys recommend? I imagine some brands are stiffer than others. Is Black Diamond considered a "low-end" brand?
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Unread 06-21-2012, 03:15 PM   #14
crackedcornish
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if I were looking for a softer ride (and I'm not..since my fabtech 3 1/2" springs/shocks ride pretty smoothly to me, and I'm in my 50's), I would have to give some serious consideration to OME 36R's or BDS 2 1/2" springs, some nice soft shocks (perhaps Bilsteins 5150's) and a 1" body lift, rather than taking a chance on another brand of 3 1/2" springs, since ride quality and comfort is a pretty subjective thing.

and remember, you could install a coil spring conversion, and end up with a ride as stiff or stiffer than you have now
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Unread 06-21-2012, 03:37 PM   #15
rage4order
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I wonder if part of the problem is I don't know if I need a softer ride or a stiffer ride! My jeep just seems very bouncy. I mean, I drive over the small seams where bridges meet the road and I bounce around a couple of times before it settles back down.
Quote:
Originally Posted by crackedcornish View Post
and remember, you could install a coil spring conversion, and end up with a ride as stiff or stiffer than you have now
That is exactly what I'm afraid of.
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