One interesting 392 XR difference you may not know

[stumblinhorse]

@gecko392xr we'd love to hear back from you to confirm the lift height since there are so much confusions and misinformation.
For example, on the ClaytonOffroad website, they claim it's the 2" factory lift for non-XR 392, they also said 1/2" lower on the XR 392 as I posted at the beginning of this thread.

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MetalCloak page says 1” factory lift.


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Somewhere I can’t recall, I read it was mentioned as a 1.5” lift and some of the youtube videos of forum members also guessed 1.5" lift.

I think what has been said by Scott in the past is that the 392s have a 1.5” factory lift. This amount can vary depending on optional equipment on that specific unit. But their goal was 1.5“ on all 392s. So if a 392 is closer to 1“ or 2” it is just a variation in options and spring sag.

 

[Diablo]

I'm not sure how this crap gets started but please let me straighten out a few things (full disclosure-I am a Propulsion Engineer for an Aerospace company and an avid off-roader, I attend some for the same conferences and workshops as the automotive engineering groups do. the Mopar SRT engineers and myself often talk about these topics, I own 3 Jeeps, one JKU, one JLU Rubicon and a 392 with XR package.) Now with that out of the way, please believe me, there is NO DIFFERENCE in the suspension on the XR and Non-XR 392 JL's. They are both Mopar's 2" factory lift kits. So, if anyone is saying they are different be assured they have no idea what their talking about and you should probably quit listening to them right then.

 

[stumblinhorse]

I'm not sure how this crap gets started but please let me straighten out a few things (full disclosure-I am a Propulsion Engineer for an Aerospace company and an avid off-roader, I attend some for the same conferences and workshops as the automotive engineering groups do. the Mopar SRT engineers and myself often talk about these topics, I own 3 Jeeps, one JKU, one JLU Rubicon and a 392 with XR package.) Now with that out of the way, please believe me, there is NO DIFFERENCE in the suspension on the XR and Non-XR 392 JL's. They are both Mopar's 2" factory lift kits. So, if anyone is saying they are different be assured they have no idea what their talking about and you should probably quit listening to them right then.

It is great to say that with so much enthusiasm. If they are using the Mopar 2” lift kit, why not include the LCAs from that kit? And use different part numbers for the springs etc?

 

[Bocephus]

I'm not sure how this crap gets started but please let me straighten out a few things (full disclosure-I am a Propulsion Engineer for an Aerospace company and an avid off-roader, I attend some for the same conferences and workshops as the automotive engineering groups do. the Mopar SRT engineers and myself often talk about these topics, I own 3 Jeeps, one JKU, one JLU Rubicon and a 392 with XR package.) Now with that out of the way, please believe me, there is NO DIFFERENCE in the suspension on the XR and Non-XR 392 JL's. They are both Mopar's 2" factory lift kits. So, if anyone is saying they are different be assured they have no idea what their talking about and you should probably quit listening to them right then.

Even shocks? Why go to the trouble of different materials (aluminum vs steel tube, IIRC), and one branded fox and the other not? A prominent contributor (Scott) says the shocks are not the same 392 vs 392 XR.

Just visually, hard for me to believe that the 392 and XR lifts are as tall as the Mopar 2”. Mopar 2 looks taller.

And as @stumblinhorse just said…the Mopar 2” includes longer lower front control arms. Maybe you’re not counting that as part of the suspension, which I get.

Fast to admit that I have none of the qualifications or connections that you do, just a jeep nerd and off-road when I can.

 

[SCARd4Life]

You are getting a factory response. Lol.

Yeah, right.

 

[Bocephus]

Yeah, right.

It’s true. He is a product planning manager for Jeep in Michigan. Proven expert contributor on 392 topics. Super cool to have him in this forum.

 

[bkilby]

It’s true. He is a product planning manager for Jeep in Michigan. Proven expert contributor on 392 topics. Super cool to have him in this forum.

Yeah, but what do I know!

 

[Diablo]

Bocephus, you said:
“Even shocks? Why go to the trouble of different materials (aluminum vs steel tube, IIRC), and one branded fox and the other not? A prominent contributor (Scott) says the shocks are not the same 392 vs 392 XR.”

(Sorry, don’t know how to quote using this site.)

You are correct, the shocks are not the same. The shock is different on the XR because the Fox used on the non-XR was tuned for the weight of the 33” tire. Now this part I’m not sure about because when I asked about the shock difference there was some internal bickering on how originally Fox didn’t have a shock tuned for the 35” tire weight, not sure how correct this is but yes, they are different.
As for the LCA’s in the front, they are the same arm used in the 2” Mopar diesel kit, meaning length and bushing design are the same.

 

[Bocephus]

Bocephus, you said:
“Even shocks? Why go to the trouble of different materials (aluminum vs steel tube, IIRC), and one branded fox and the other not? A prominent contributor (Scott) says the shocks are not the same 392 vs 392 XR.”

(Sorry, don’t know how to quote using this site.)

You are correct, the shocks are not the same. The shock is different on the XR because the Fox used on the non-XR was tuned for the weight of the 33” tire. Now this part I’m not sure about because when I asked about the shock difference there was some internal bickering on how originally Fox didn’t have a shock tuned for the 35” tire weight, not sure how correct this is but yes, they are different.
As for the LCA’s in the front, they are the same arm used in the 2” Mopar kit, meaning length and bushing design are the same.

Thanks ! But the LCA for the 392 and XR is the same as a standard rubi. Not the 2” Mopar lift LCA.

 

[TCMopar]

I have 2 Rubicon 392's, one XR and one non-XR. Have 37" Nitto Ridge Grapplers with 20x10 wheels on both. XR sits about 1/2" higher than non-XR. And for whats its worth, in my opinion, the non-XR rides better with the 37's than the XR

 

[Fast-n-Furious]

I have 2 Rubicon 392's, one XR and one non-XR. Have 37" Nitto Ridge Grapplers with 20x10 wheels on both. XR sits about 1/2" higher than non-XR. And for whats its worth, in my opinion, the non-XR rides better with the 37's than the XR

Great to know, thanks. Both front and rear of the XR higher or just front?

 

[Diablo]

Well from what I was told the Mopar diesel 2” lift and the 392 LCA’s are supposed to be .250 longer (1/4”) then a regular Rubicon, But if you measured the two and come up with the same measurement I’ll for sure take your word for it.
I do know for a fact that the stock 392 with XR is 2” taller then my 3.6 JLU Rubicon. This was measured from top of axle to spring bucket (23JLU Rubicon @10” and 23 JLU 392 @12”) before I installed my coil over system on my 392.

 

[stumblinhorse]

Well from what I was told the Mopar diesel 2” lift and the 392 LCA’s are supposed to be .250 longer (1/4”) then a regular Rubicon, But if you measured the two and come up with the same measurement I’ll for sure take your word for it.
I do know for a fact that the stock 392 with XR is 2” taller then my 3.6 JLU Rubicon. This was measured from top of axle to spring bucket (23JLU Rubicon @10” and 23 JLU 392 @12”) before I installed my coil over system on my 392.

I‘ll do you one better. I have replaced my 392 lca’s with the Mopar lift lca’s. And not only are they longer, they are about 50% more heavy duty by weight.

 

[Bhodi11]

This guy is amazing!

Yup he is The Godfather of the 392

 

[Ted392]

I‘ll do you one better. I have replaced my 392 lca’s with the Mopar lift lca’s. And not only are they longer, they are about 50% more heavy duty by weight.

Truth. I changed my MY22 392XR fromt lca's and had same experience as Stumblinhorse.

 

[Cat4]

Truth. I changed my MY22 392XR fromt lca's and had same experience as Stumblinhorse.

Same here

 

[TCMopar]

Great to know, thanks. Both front and rear of the XR higher or just front?

3/4" inch higher in rear and 1/4" in front

 

[Fast-n-Furious]

I‘ll do you one better. I have replaced my 392 lca’s with the Mopar lift lca’s. And not only are they longer, they are about 50% more heavy duty by weight.

I’m learning about the benefits of long arm kit, they are quite expensive though. The Mopar LCA from the 2” lift seems to be a cost effective option if my goal is to improve on-road handling. What’s your driving impression with the LCA upgrade?

 

[stumblinhorse]

I’m learning about the benefits of long arm kit, they are quite expensive though. The Mopar LCA from the 2” lift seems to be a cost effective option if my goal is to improve on-road handling. What’s your driving impression with the LCA upgrade?

Longer LCAs will improve the return to center of the steering. This helps diminish what people call vagueness in the steering. Jeep will also track straighter. Also it is a plug and play upgrade. No other work required, no alignment needed, and Mopar parts…

 

[Fast-n-Furious]

Longer LCAs will improve the return to center of the steering. This helps diminish what people call vagueness in the steering. Jeep will also track straighter. Also it is a plug and play upgrade. No other work required, no alignment needed, and Mopar parts…

Thanks for your insights!