TJ springs on a JK? - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 6 Old 04-17-2015, 12:54 PM Thread Starter
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TJ springs on a JK?

I am about to pull the trigger on a lift for teh JK (2008 unlimited), however just came across some posts on other forums about using JK springs (stock) to lift a TJ..... interesting, similar fit and a possible free lift if you have the JK parts laying around for your TJ

I have some new TJ Rubicon Express lift springs at home, so am curious about trying them up and see if they woudl actually work. Anyone has any info before I go in that path? I believe my TJ lift springs are either 5" or 7" new from a long arm kit from my TJ. I ended up never using the springs and they are just sitting on the shelf...

quoting an old post here "Also I know that poly performance / synergy suspension lists there TJ/JK front lift springs with the same part number for a 3" lift. ...PPM-8063-20." and directly from Poly's site: http://www.polyperformance.com/Syner...ngs?multi=2039



Thanks!

Gui


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Last edited by geberhard; 04-17-2015 at 12:58 PM.
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post #2 of 6 Old 04-17-2015, 12:59 PM
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Fronts work rear don't. It will be less than advertised lift IIRC.
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post #3 of 6 Old 04-17-2015, 12:59 PM Thread Starter
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So yep answering my own question looks like the TJ springs (at least fronts) shoudl work on a JK, and will be close to 1 less inch of lift on a JK compared to a TJ - I am not considering spring rating etc, just part numbers:

8063-20 Jeep TJ/LJ 2.0" Front Lift Springs
8063-20 2-Door Jeep JK 3.0" Front Lift Springs


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post #4 of 6 Old 04-17-2015, 10:14 PM
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Yeah, that's all right. Honestly I wouldn't go there, your springs will be more compressed than they were designed, leaving you with a squishy ride and a lack of options when you add bumpers, armor, ect.

Pete from JKS Manufacturing
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post #5 of 6 Old 04-18-2015, 08:17 AM
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Coil rates would be all out of whack as the JK is much heavier then the TJ.
I would expect them to be super soft and compress too easy over rough surfaces.

Some build info here:
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post #6 of 6 Old 05-04-2015, 08:00 PM Thread Starter
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guys thanks for the info, yep biting the bullet and going with a full kit. thanks!


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