Question on Rubicon Takeoffs

[2upertf]

So I installed some Rubicon takeoffs a while back and have had some issues with the harshness of the ride when going over bumps such as speed bumps as well as with general off-roading.
I have some experience with suspension systems in other off road vehicles but not so much with jeeps so I wanted to see if there's any weight to my suspicion.
Typically the Rubicon takeoff springs are designed for a heavier vehicle so I'm thinking that might be the root cause since my vehicle is using less sag and therefore perhaps less usable travel due to the lighter weight.
If the vehicle is sitting higher then the springs must be harder therefore that would contribute to a harsher ride than stock.
I also think it could be an issue with the shocks wearing out.
Have any others had similar issues or concerns?

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[SouthCo]

Rubicon springs will give you a little firmer ride. I don't know if I'd call it harsh though.

 

[Beachcomber72]

There’s different rubicon springs, I.e. springs from regular rubi without steel bumper group and the springs for the steel bumper group. If I’m remembering correctly. And they are side to side front to back specific numbered.

 

[SouthCo]

There’s different rubicon springs, I.e. springs from regular rubi without steel bumper group and the springs for the steel bumper group. If I’m remembering correctly. And they are side to side front to back specific numbered.

Yes you are remembering correctly. Somewhere on here there is at least one thread listing the different spring numbers.

 

[blnewt]

Yes you are remembering correctly. Somewhere on here there is at least one thread listing the different spring numbers.

https://www.jlwranglerforums.com/fo...gs-suspension-information-chart-matrix.66591/

 

[2upertf]

There’s different rubicon springs, I.e. springs from regular rubi without steel bumper group and the springs for the steel bumper group. If I’m remembering correctly. And they are side to side front to back specific numbered.

I have the 590/591 and 659/660 spring combination and I have a JLU 2.0 Sport S with hardtop. I don't believe they are from a diesel. I have a smittybilt bumper on the front which will add to the weight.

I'm just trying to figure out what I can do to make the ride a little softer. I suspect I'll need new shocks regardless, but whether to keep the springs as-is or get some aftermarket with a 2.5 inch lift such as Teraflex.

 

[AdamG]

I’d get the shocks you would get with the lift. If the shocks solve it, then you can decide to lift or not. If they don’t, then you’ve got the shocks you were probably gonna buy anyways. How much lift did you get? If you’ve already got a 4dr and put on Rubi 4dr springs, the weight diff shouldn’t be that much.

 

[marriott211]

I swapped shocks and springs from a diesel Rubi hardtop with steel bumpers into my 2-door soft top Willys. Got 3" of lift and a little firmer ride. Threw on some 35s and that helped a bit to soften things up.

Next step will be to look at shocks. I'll be curious what you gonwith and if it helps.

Good luck and report back! ?

 

[The Fixer]

I have the 590/591 and 659/660 spring combination and I have a JLU 2.0 Sport S with hardtop. I don't believe they are from a diesel. I have a smittybilt bumper on the front which will add to the weight.

I'm just trying to figure out what I can do to make the ride a little softer. I suspect I'll need new shocks regardless, but whether to keep the springs as-is or get some aftermarket with a 2.5 inch lift such as Teraflex.

I also have a 2.0T 2-door Sport. I have the 60/61s up front, and the same 90/91 in the rear. What kind of offroading do you do? Are you airing down at all, or disconnecting the front swaybar? That will help a ton in the ride quality offroad.

On road is a bit more subjective. I feel like my JL actually rides better over railroad crossings and potholes with the Rubi springs/shocks/tires than it did with the stock stuff. I have 20K on it since we swapped everything, including a few trips offroad. What tire pressure do you run on the road? What tires?

 

[Old Jeeper]

So I installed some Rubicon takeoffs a while back and have had some issues with the harshness of the ride when going over bumps such as speed bumps as well as with general off-roading.
I have some experience with suspension systems in other off road vehicles but not so much with jeeps so I wanted to see if there's any weight to my suspicion.
Typically the Rubicon takeoff springs are designed for a heavier vehicle so I'm thinking that might be the root cause since my vehicle is using less sag and therefore perhaps less usable travel due to the lighter weight.
If the vehicle is sitting higher then the springs must be harder therefore that would contribute to a harsher ride than stock.
I also think it could be an issue with the shocks wearing out.
Have any others had similar issues or concerns?

I recommend you look at your tire PSI. The door jam calls for 37, but I run mine at 32, better ride for sure.

Not sure what tires you have but try 35 and then 32 to see if it's not better. I do NOT consider the Rubicon ride as harsh, firm, yes, harsh, no.

 

[blnewt]

I have the 590/591 and 659/660 spring combination and I have a JLU 2.0 Sport S with hardtop. I don't believe they are from a diesel. I have a smittybilt bumper on the front which will add to the weight.

I'm just trying to figure out what I can do to make the ride a little softer. I suspect I'll need new shocks regardless, but whether to keep the springs as-is or get some aftermarket with a 2.5 inch lift such as Teraflex.

I have pretty much the same setup, the stock Rubi shocks are pretty soft vs. anything aftermarket, don't think the shock change would help w/ the ride characteristics you're after. Like others mentioned, getting those tire to a lower psi could make just the difference you're wanting.

I ended up w/ Fox 2.0 shocks and it's firmer still, but in a more controlled way, not as mushy. I have my tires about 30 psi FWIW.

 

[2upertf]

I’d get the shocks you would get with the lift. If the shocks solve it, then you can decide to lift or not. If they don’t, then you’ve got the shocks you were probably gonna buy anyways. How much lift did you get? If you’ve already got a 4dr and put on Rubi 4dr springs, the weight diff shouldn’t be that much.

I got about 1.5" I would guess. Also put on the daystar spacers at the same time.

 

[2upertf]

I also have a 2.0T 2-door Sport. I have the 60/61s up front, and the same 90/91 in the rear. What kind of offroading do you do? Are you airing down at all, or disconnecting the front swaybar? That will help a ton in the ride quality offroad.

On road is a bit more subjective. I feel like my JL actually rides better over railroad crossings and potholes with the Rubi springs/shocks/tires than it did with the stock stuff. I have 20K on it since we swapped everything, including a few trips offroad. What tire pressure do you run on the road? What tires?

I do mostly just dirt roads but also some more gnarly trails. I haven't really aired down since it takes so long to add air again with my compressor. I usually run about 38psi. I haven't tried disconnecting the swaybar either. I have 285/70R17s mud terrain.
When I go over potholes the whole jeep shakes and rolls.

 

[2upertf]

I recommend you look at your tire PSI. The door jam calls for 37, but I run mine at 32, better ride for sure.

Not sure what tires you have but try 35 and then 32 to see if it's not better. I do NOT consider the Rubicon ride as harsh, firm, yes, harsh, no.

I will see how it rides with a little less psi. I have 285/70R17s and usually run them at 38-40. If you run at 32 do you get the low pressure warning?

 

[The Last Cowboy]

So you still have the black Sport shocks? If so, that's a big part of the problem.

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