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Old 04-02-2012, 08:16 PM   #1
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Rubicon Express 3.5" lift upgraded to 4.5" question

I have the 3.5" superflex lift kit and was wondering what is needed to upgrade to 4.5"? Is it just the coil springs?

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Old 04-02-2012, 08:23 PM   #2
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What kit do you have. The basic, or do you have all 8 arms . Do you have a sye with cv drive shaft. Why do you want to go with the taller spring?

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Old 04-02-2012, 08:26 PM   #3
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The 4.5 kit comes with upper arms IIRC. I have the 4.5 kit with 3.5" coils. Much better deal IMO.
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Old 04-02-2012, 10:03 PM   #4
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I have a sye and cv driveshaft, upper adjustable control arms, etc. On the rubicon express 3.5" SUPERFLEX kit, it says it can be upgraded to a 4.5" lift easily, but it does not say what I need to get to upgrade it. Im wondering what i need to get in order to get the extra 1"..??
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Old 04-03-2012, 05:26 AM   #5
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Change the springs and adjust your track bars. That's it.
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Old 04-03-2012, 05:33 AM   #6
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I would do a 1" body lift and save both money and a bit of control arm angle. But to answer the question you did ask all you need is the spring, if you have all the rest of that stuff. Although, if I were buying new springs re wouldn't be anything I would concider again due to the amount of rake they left me with. There are better springs available for the money.
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Old 04-03-2012, 08:06 AM   #7
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Quote:
Originally Posted by rda616
I would do a 1" body lift and save both money and a bit of control arm angle. But to answer the question you did ask all you need is the spring, if you have all the rest of that stuff. Although, if I were buying new springs re wouldn't be anything I would concider again due to the amount of rake they left me with. There are better springs available for the money.
Agree, I hear the re 4.5 springs have a lower spring rate and are more prone to sagging under load (winch/bumpers)
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Old 04-09-2012, 10:12 AM   #8
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Quote:
Originally Posted by ebp123 View Post
I have the 3.5" superflex lift kit and was wondering what is needed to upgrade to 4.5"? Is it just the coil springs?
Well the difference between the two kits (besides the coils) is the 4.5" kit has longer front bump stops, adjustable upper arms front and rear, an adjustable front track bar and longer front disconnect links and a slightly different rear track bar bracket.

Now weather you actually need to change all this stuff over or not is questionable. I would say throw the coils on there and see if it works on your Jeep.
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Old 04-13-2012, 01:46 PM   #9
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Once you have the coils on make sure your shocks are long enough or you will destroy them. I think the RE website recommends different shocks for the 3.5 and 4.5.

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