JKU Sport- Suspension seems 'soft' when hauling all my gear. How do I stiffen it up?

j33p3rscr33p3rs

New member
Hello everyone,

I'm glad to have found this forum where Jeep people focus more on mileage and travel than rock crawling. Hard to find the advice I'm looking for from traditional Jeep users.

I have a JKU Sport I am overall quite happy with. My typical outings are 3-5 hours highway, then 4-6 hours abandoned dirt roads and logging roads. Lots of mud, the odd rock or log, small river/stream crossings, road washouts. Snow. Lots of snow and random drifts in the winter. And so far it has been great for my use! It has the 17" wheels, ~32" Wrangler SR-A's (Plan to upgrade to similar sized AT's when they wear out), 3.73 gears, and the stock suspension (Coils are '17' front, '58' back, with the black shocks). A Rubicon was not in the cards, so I made I made sure to get the lower gears and bigger tires. I've read and researched a lot, but am still very new and inexperienced.

The suspension is my only issue so far. It is fine for driving and exploring, but when I load in the family and all our gear for a week in the wilderness, I find it starts to feel kinda 'soft.' I don't know how better to explain it. I can't say it is actually sagging (never measured, but I think I will next time), but feels like it.

So I am curious about suggestions to remedy this? I don't necessarily want a lift, but I would not be against one ether. I mean upgrades are always fun, but honestly the vehicle does everything I need it to do stock so far. My priority is getting the Jeep to feel more 'solid' and responsive when loaded up and avoid negatively impacting the fuel economy.
 

afd660

New member
You can search for sale sections on different jeep forums for used Rubicon springs. Not many people want stock Rubicon springs so they should go for next to nothing. I think it'll give a .5 increase in height and are a little bit stiffe so it should the softness will go away loaded down.


https://teraflex.com/shop_items/528ffa7fead962f416e72d79

This may help also. It gives a little boost to compensate for the weight of gear and family loaded in.
 

kojackJKU

Autism Family Travellers!
He pretty well has the rubicon springs now, as the rubi's come with everything from 58-60s in the back, and anywhere from 17-18s in front. I have 18/59 springs in my sport and it squats in back fully loaded but only 1/2 inch or so. Now, you can do the cheap and easy route and add a set of air bags. This will add spring rate to the rear to compensate for the extra weight. I have the teraflex leveling spacer kit. There is a bit of modification to fit the airbags in but nothing to serious. If you don't want to run the teraflex leveling kit, then its just a toss in and go.

A lot of people will say don't use them, but I have had great results with them in my rigs.
 

SoCal Tom

Explorer
I'm running the Teraflex performance leveling kit . The springs are a little big firmer, but not too bad. I run the Bilstiens HD shocks and I'm happy with similar use.
Tom
 

jaxs1984

Adventurer
I'm using AEV 2.5 with correction brackets and it drives great on highway and off-road and can take the extra weight, etc. I'm very happy with it.
 

j33p3rscr33p3rs

New member
Thank you for all the replies- A lot of stuff to look into and compare.

One thing I am not to sure of based on all the posts- Can I solve my problem simply by changing coils? Or do I need to change both coils and shocks?
Lt Dan mentioned just changing shocks?

I'm a bit confused!
 
I am currently running rear airbags on my jeep but will be switching the coils and springs out in lieu of ARB heavy coils and nitro shocks this year.
 

kojackJKU

Autism Family Travellers!
I would do that too, but I do use my rig empty a lot as well, so I am afraid of crap ride quality if I step up to heavy springs.
 

SoCal Tom

Explorer
Thank you for all the replies- A lot of stuff to look into and compare.

One thing I am not to sure of based on all the posts- Can I solve my problem simply by changing coils? Or do I need to change both coils and shocks?
Lt Dan mentioned just changing shocks?

I'm a bit confused!

It depends on what you are after. If its sagging due to weight, then some coils with a small lift will work with your current shocks. If the issue is you are bottoming out when hitting bumps, then you probably needs better shocks, and maybe you need coils.
Tom
 

yaya

New member
+1 on the air bags by airlift. I guess it all comes down to budget. The airbags can be had for around $80 and I managed to install them myself in about an hour. You just got to monitor the pressure on them,keeping them no less than 5 psi. They make a huge difference to the rear end ride quality when loaded and prevents saging.
 

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