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Old 08-14-2008, 03:18 PM   #1
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Rubicon vs. TJ springs: The Results.....

Howdy Cool Dudes and Dudettes,

I had some front end sag in my TJ and was thinking about going with some 2" or 3" springs to correct it. The initial problem is listed here:

http://www.wranglerforum.com/tj-jeep...sag-20109.html

Anyway, No one could give me a straight answer if Rubicon Springs were different from standard TJ springs. Since I acquired a set of Rubicon springs for free (though I'll buy my friend dinner next time I see him), I figured that I would give them a try. Here are the results:

The before photos:











Next is the TJ Spring next to the Rubicon spring (TJ on left). The height looks identical, however, I did discover a difference between the two. The TJ spring measured around .475 of an inch thick while the Rubicon spring measured about .507 of an inch thick. I am guessing that it has a stiffer spring rate, plus it is designed for a 4.0 while my TJ only has the 2.5.










The ending photos:










The conclusion:

Rubicon springs are different from a 2.5 litre TJ springs. Here is where my data is skewed: The Rubicon Springs I believe had less than 6 months of use. My TJ springs were 9 years old. Another factor that would be worth exploring is comparing the Rubicon springs to a 4.0 litre TJ to see if the engine size makes a difference with the springs initially installed on a TJ.

Sorry for the limited photos. Apparently we are restricted to 10 images.

Hope this answers some questions for someone in the future.


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Old 08-14-2008, 04:27 PM   #2
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The front springs in my X had the same tag numbers (spring rates) as some Rubicon springs I'd once gotten (my '02 X and an '05 Rubicon). The rears were different though. I don't remember what the numbers were though.

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Old 08-14-2008, 07:10 PM   #3
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i hate the rubicon springs. i tried them to get rid of the front end sag. but they were way too stiff.
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Old 08-15-2008, 03:37 AM   #4
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I wonder how the JK springs compare? I have 2 sets of those taking up space in my Garage.
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Old 08-15-2008, 10:05 AM   #5
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Quote:
Originally Posted by jeffsjk View Post
I wonder how the JK springs compare? I have 2 sets of those taking up space in my Garage.
While there may or may not really be a difference in the TJ spring rates from Rubicon as opposed to at least any other TJ 6 cylinder, there apparently is some sort of a difference in the JK springs. A friend of mine got some take-offs from the dealership for his JK X. We talked about the lack of difference in the TJ springs, and the dealership did some checking, and the Rubicon springs in the JKs are supposed to actually be 3/4" taller than the regular JK X springs. Again, that's just what the dealership said based on what we were trying to find out.
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Old 08-15-2008, 10:53 AM   #6
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Why not get some spacers or perhaps JKS adjustable coil adapters?

I had the same problem after I lfter mine and added the winch and aftermarket bumper. The adjustable coil adapters are more expensive, but you can dial in the ride perfectly and if it sags more later, simply re-adjust.....

Ok, I know, when the springs get really beat...change the springs. The adjustable coil adapters - IMHO - are a great way to go.
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Old 08-15-2008, 05:30 PM   #7
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a friend has a engine lathe. he makes me spacers whenever i want for free.
when my front sags a bit more...he will make me some bigger spacers.
the ACOS are way too expensive for only spacers IMO.
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Old 08-15-2008, 07:46 PM   #8
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Quote:
Originally Posted by nicolas-eric View Post
i hate the rubicon springs. i tried them to get rid of the front end sag. but they were way too stiff.
I couldn't agree more. I cant wait to get my new lift in just to throw these rubi springs in the woods. Horrible ride.
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Old 08-16-2008, 01:50 AM   #9
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Quote:
Originally Posted by orange05tj View Post
I couldn't agree more. I cant wait to get my new lift in just to throw these rubi springs in the woods. Horrible ride.
my jeep dealer gave me the front rubicon springs on warranty because of the front sag. after he noticed the bad ride he talked with jeep germay and then he gave me 1/3 of the money for the OME lift.
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Old 08-21-2008, 11:06 PM   #10
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Quote:
Originally Posted by nicolas-eric View Post
i hate the rubicon springs. i tried them to get rid of the front end sag. but they were way too stiff.

Nicolas, thank you for your input, but where in the original post does it ask "What is your opinion on Rubicon springs?"

Perhaps you could give us some feedback as to whether the Rubicon springs helped your front end sag or not. That would better support this thread than your opinion of the springs, since this was more to determine the differences between the Rubicon and non-Rubicon springs.

Happy wheeling and stay safe.

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