RE Progressive Spring Issue - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 3 Old 07-23-2019, 09:27 AM Thread Starter
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RE Progressive Spring Issue

I thought I would share some info since I couldn't find any threads on the subject.

I recently decided to go with a lower lift height spring so I thought I would give the Rubicon Express 3.5 progressive springs for the JKU (RE1371P,RE1376P) a shot. As a comparison I also brought in the standard RE 3.5 springs (RE1371,RE1376). I am switching from a Pro Comp 5" spring on a long arm kit.

The standard RE 3.5" springs lowered the Jeep 1.5" as expected. When opened the box for the progressive spring I noticed a smaller spring diameter than the PC and the RE standards. The unsprung length of the progressive was close to the 5" springs and that was perfect because I wanted to keep the longer shocks I had from the larger lift and keep the springs in the bucket.

After installing the progressive it lowered the Jeep 3" and the springs had some pretty bad deflection. I called RE and they stated it was a known issue and due to the JL its on the back burner to fix. Long story boring the RE 3.5" Progressive is a weak and overrated lift height spring.

I hope this helps someone. I still haven't decided on a spring that will stay seated.

My Jeep has steel bumpers and rock sliders so its fairly weighted down. 09JKUR
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post #2 of 3 Old 07-23-2019, 11:00 AM
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You would figure that after the bushing debacle, they would work a bit harder to address "known issues". Then again they are owned by Trans so they can do whatever they want...


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post #3 of 3 Old 07-23-2019, 06:20 PM
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Quote:
Originally Posted by buschpounder View Post
After installing the progressive it lowered the Jeep 3" and the springs had some pretty bad deflection.
. . . it appears the bow in that spring could be because it's elevated on the right side of the photo, possibly due to interference with the inner C gusset.

Here's the quickest recent pic I could find of my front end showing the spring and C-gusset:

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EDIT: adding another view:

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My springs rub and squeak on the C-gussets, but sit pretty flat on the spring perches.

"Fawk RE" is a pretty safe bet but that one specific gripe may be not their fault (but I'm not betting on it).

If I'm just seeing it wrong / optical illusion / etc., disregard . . .

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Last edited by ExWrench; 07-23-2019 at 06:34 PM.
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