Mopar 2" Lift Kit - Free Length & Spring Rate

[JeepOfTheseus]

As the title suggests, does anyone know the actual free length and spring rate specs of the springs that come in the Mopar 2" lift kit? I'm trying to pair a set of springs with the new Fox 2.5 Performance shocks I bought and trying to gauge how other springs will compare to what I have.

I actually bought the AEV 3" HD springs already, but am now second guessing that they may be way too stiff and tall for my likings. Instead, I have my eyes on either the Clayton 2.5" front and rear or EVO plush front and rear. Was debating EVO HD as well, but I wonder if that will also be too stiff.

Ultimately, I'm looking for something a little stiffer than the Mopar kit, but not more than 0-1" of lift above and beyond what I have.

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[Minty JL]

I found the Mopar performance springs on my JLUR to be stiff as hell...........like driving a mid 80s F250.

 

[JeepOfTheseus]

I found the Mopar performance springs on my JLUR to be stiff as hell...........like driving a mid 80s F250.

Well that's why I'm wondering if I'll be in for a shock if I go with "HD" coils. I've gotten feedback from both Northridge and AEV themselves that with my setup I'm right at the borderline of whether HD is a good fit. I daily drive with a roof rack that has a 180* awning and shower stall, as well as my RTT and hard rolling cover on the bed. That alone is probably still within the "standard" range, but once I load up with water/fuel on the roof, fill up the 8 gal Waterport on the bed, and pack up with gear...I'm probably well into HD territory.

 

[RealMcCoy]

I found the Mopar performance springs on my JLUR to be stiff as hell...........like driving a mid 80s F250.

As the title suggests, does anyone know the actual free length and spring rate specs of the springs that come in the Mopar 2" lift kit? I'm trying to pair a set of springs with the new Fox 2.5 Performance shocks I bought and trying to gauge how other springs will compare to what I have.

I actually bought the AEV 3" HD springs already, but am now second guessing that they may be way too stiff and tall for my likings. Instead, I have my eyes on either the Clayton 2.5" front and rear or EVO plush front and rear. Was debating EVO HD as well, but I wonder if that will also be too stiff.

Ultimately, I'm looking for something a little stiffer than the Mopar kit, but not more than 0-1" of lift above and beyond what I have.

I have the Mopar 2 inch lift on my gladiator. I also have the ALU-CANOPY- CAMPER. Fully loaded with H2o tank. Rides like a Cadillac.
However, I am looking at springs also I can ghost different cause it. Just rise when I’m four wheeling I just follow the terrain.
I will watch a show! With hopes to find out what is a good sprain

 

[RealMcCoy]

I need to start preview my text. Part of that paragraph should say something different.
Like it should read, I know the difference of a heavier spring may help me even more.

 

[JeepOfTheseus]

The Mopar kit is definitely plush, and maybe I shouldn't take that for granted, but would prefer something a little more planted at times.

 

[RealMcCoy]

Lol, yea gotcha here is my last plant in TN.

 

[mx5red]

Well that's why I'm wondering if I'll be in for a shock if I go with "HD" coils. I've gotten feedback from both Northridge and AEV themselves that with my setup I'm right at the borderline of whether HD is a good fit. I daily drive with a roof rack that has a 180* awning and shower stall, as well as my RTT and hard rolling cover on the bed. That alone is probably still within the "standard" range, but once I load up with water/fuel on the roof, fill up the 8 gal Waterport on the bed, and pack up with gear...I'm probably well into HD territory.

Sorry I don't know spring specs (have never seen the Mopar specs listed) but I would not get the plush springs.
You are heavier than I am (I carry recovery gear and stereo in cab, and rolling cover and bed rack), and I am very satisfied with the Clayton 2.5" HD springs out back. Definitely do not feel harsh around town. The stock Rubicon shocks were soooooo soft I was rocking and swaying all over the place, it felt unsafe at speed.
I swapped out the shocks for some Mojave takeoffs, and 90% of the issue went away. A week later had time to swap OEM stock springs (which are softer than the Mopar lift springs) to the Clayton HD, and did not notice a drastic ride change as far as comfort or small bumps, but did help control some sway and stuff at speed.

You sound like you should be getting an HD spring. I feel like I see people say the Mopar lift springs are either soft or hard, so I'm not sure how to gauge those. I'm guessing they are on the soft end for people loaded up like you, and harsh for people with nothing in the bed.

 

[chorky]

Well that's why I'm wondering if I'll be in for a shock if I go with "HD" coils. I've gotten feedback from both Northridge and AEV themselves that with my setup I'm right at the borderline of whether HD is a good fit. I daily drive with a roof rack that has a 180* awning and shower stall, as well as my RTT and hard rolling cover on the bed. That alone is probably still within the "standard" range, but once I load up with water/fuel on the roof, fill up the 8 gal Waterport on the bed, and pack up with gear...I'm probably well into HD territory.

Before you buy anything else, go to a CAT scale To get your weight, then add to that other items you dont yet have on to at least get an estimate of where you sit. Dont just shotgun and guess with such a subjective term as ‘ride quality’ as it might leave you less than happy.

I have the standard duty AEV springs - but the math says I should be in the HD territory. I do bottom out a fair bit off road at speed but that is much more a shock situation.

The other thing to consider is shock tuning with spring rates. I am willing to bet the shocks you have are more suited to go along with the standard duty springs than the HD ones. Not that it wont work though. I spoke with fox several times and their engineers have said that all of their shocks, regardless of lenth over stock, are still designed with stock weight in mind with the stock spring rate in mind. Meaning with a stiffer spring, your shocks might not have enough damping power or you might be at the max end of the adjustability. even the 5100’s that come with the standard AEV kit, after having them a while, seem like they would be under dampened for the HD springs as they are already borderline with a heavy load and the standard springs.

Get weights first. Thats an important step that nearly everyone seems to forget or ignore.

 

[JeepOfTheseus]

Before you buy anything else, go to a CAT scale To get your weight, then add to that other items you dont yet have on to at least get an estimate of where you sit. Dont just shotgun and guess with such a subjective term as ‘ride quality’ as it might leave you less than happy.

I have the standard duty AEV springs - but the math says I should be in the HD territory. I do bottom out a fair bit off road at speed but that is much more a shock situation.

Get weights first. Thats an important step that nearly everyone seems to forget or ignore.

I actually did; 6200 lbs with daily accessories, but not loaded out for camping (i.e. RTT and empty Waterport on the bed, roof rack w/awning and shower, but otherwise no gear - no coolers, fridge, fuel/water etc.). 3060 lb on the front axle, 3140 lb on the rear.

 

[chorky]

I actually did; 6200 lbs with daily accessories, but not loaded out for camping (i.e. RTT and empty Waterport on the bed, roof rack w/awning and shower, but otherwise no gear - no coolers, fridge, fuel/water etc.). 3060 lb on the front axle, 3140 lb on the rear.

oh nice! How much extra do you think camping gear and people wh will weigh?

 

[RealMcCoy]

Sorry I don't know spring specs (have never seen the Mopar specs listed) but I would not get the plush springs.
You are heavier than I am (I carry recovery gear and stereo in cab, and rolling cover and bed rack), and I am very satisfied with the Clayton 2.5" HD springs out back. Definitely do not feel harsh around town. The stock Rubicon shocks were soooooo soft I was rocking and swaying all over the place, it felt unsafe at speed.
I swapped out the shocks for some Mojave takeoffs, and 90% of the issue went away. A week later had time to swap OEM stock springs (which are softer than the Mopar lift springs) to the Clayton HD, and did not notice a drastic ride change as far as comfort or small bumps, but did help control some sway and stuff at speed.

You sound like you should be getting an HD spring. I feel like I see people say the Mopar lift springs are either soft or hard, so I'm not sure how to gauge those. I'm guessing they are on the soft end for people loaded up like you, and harsh for people with nothing in the bed.

I guess it should be said, i run the Rubicon mopar 2” on Dana 44 HD which may be a different setup than what you have .. but i am fond of the Clayton HD overland that Clayton Offers

 

[RealMcCoy]

oh nice! How much extra do you think camping gear and people wh will weigh?

Weight is alway an issue even put on the metal cloak bracket for my rear tire rod mounts. I also have the Clayton and the hellwig swaybar on my system. I started beefing up my springs. My next big work is the front end looking at RPM steering and upgrading my track bar on the front with a Clayton track-bar, I run 37 inch tires Nitto.
so , yes weight is something o be concerned with imho.

 

[RealMcCoy]

Well that's why I'm wondering if I'll be in for a shock if I go with "HD" coils. I've gotten feedback from both Northridge and AEV themselves that with my setup I'm right at the borderline of whether HD is a good fit. I daily drive with a roof rack that has a 180* awning and shower stall, as well as my RTT and hard rolling cover on the bed. That alone is probably still within the "standard" range, but once I load up with water/fuel on the roof, fill up the 8 gal Waterport on the bed, and pack up with gear...I'm probably well into HD territory.

Did you make the switch?

 

[JeepOfTheseus]

oh nice! How much extra do you think camping gear and people wh will weigh?

Waterport is 8 ga, so about 60 lb there. At most, I would carry 8 ga of drinking water and 8 ga of fuel via 8 x 2 ga Rotopax on the roof rack (~100 lb). Dometic 35 fits in the bed at 40 lb dry. Dometic 75 is 60 lb dry, but that only fits in the cab on the rear seat. Roam 95L is 25 lb dry, 55L is 20 lb, 45QT cooler is 30 lb - if I had to ballpark, they are all double that loaded, so ~150 lb.

If I was geared up all-in again for a multi-day excursion like I did in Death Valley (3 days), probably an extra 500-600 lb of gear minimum. I'm exploring the option of keeping the Dometic 35 in the bed on a more daily use-case, but that's a minimal amount of weight overall.

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