Strongest rear springs recomendation

[Teqsand]

Looking for real world experience recommendations for rear springs for the JTR....
It had a rake until I installed a 300lb steel shell so it sits level now...

When I add gear the rear sags....I do mostly overlanding but do like to crawl too

Looking for a strong rear spring. I hacex4" lift on it now so PLEASE, save us all the wasted time and don't recommend springs below 4" lift, I cannot use a 3" or even a 3.5, JUST 4+

THANKS

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[Stan H]

https://teraflex.com/jt-4-5-lift-coil-spring-kit-rear.html

How about these .. Triple Rate HD "outback" as they call them ?

 

[jjmstang]

Might want to just put a spacer in there or use airbags.

 

[HooliganActual]

Looking for real world experience recommendations for rear springs for the JTR....
It had a rake until I installed a 300lb steel shell so it sits level now...

When I add gear the rear sags....I do mostly overlanding but do like to crawl too

Looking for a strong rear spring. I hacex4" lift on it now so PLEASE, save us all the wasted time and don't recommend springs below 4" lift, I cannot use a 3" or even a 3.5, JUST 4+

THANKS

I was facing the same problem and here's your best bet for the best resolution: call Deaver Spring
https://deaverspring.com/

They are located in your neck of the woods (Santa Ana) and they will make custom springs based on the load you are going to be carrying.

My fully loaded overland setup was sagging my stock Rubicon rear springs. Rather than "guess" or rely on some vendor's statement that "it should be fine", I had the place that installed my lift work with Deaver Spring to custom build springs designed for the weight that I was carrying. I can't tell you the actual cost, but it was only a $600 upcharge on the lift when I had it installed.

Here's some pics:
Stock (not a great pic but you can see the minimal gap in the rear wheel well)

After (2.5" lift with the Deaver Springs)

That was 2+ years ago and I have had no issues with the rear end sagging or the rear tires rubbing.

Yes, you could buy one of the lift makers (AEV, Clayton, etc.) springs that "should" work, but it is just a guess because they weren't built with your load in mind. Deaver will make what you tell them you need.

EDIT: I should note that Deaver built my springs to handle 900# - 1200#

 

[BlueScapegoat]

Been happy with my AEV HD coils (diesel.) A 1" spacer in the front with a winch on the factory steel bumper and about 575 lbs in/on the bed as pictured (counting the spare that's mounted under the rack)

Drives balanced, rides pretty good. Still using the factory fox shocks spaced down. Articulates just dandy. The 3" coils do only lift 3" in the front with a winch, but I measured closer to 5" in the rear. Kind of hard to equate since they're intented for carrying the weight and I wasn't fully loaded when I installed the coils and took my measurements. That and suspension manufacturers quoted lift heights really mean jack shit

Here it is with about 650 lbs in the rear, again, counting the spare, and with a 1" spacer in the front making for a 4" lift in the front:

 

[chorky]

Been happy with my AEV HD coils (diesel.) A 1" spacer in the front with a winch on the factory steel bumper and about 575 lbs in/on the bed as pictured (counting the spare that's mounted under the rack)

Drives balanced, rides pretty good. Still using the factory fox shocks spaced down. Articulates just dandy. The 3" coils do only lift 3" in the front with a winch, but I measured closer to 5" in the rear. Kind of hard to equate since they're intented for carrying the weight and I wasn't fully loaded when I installed the coils and took my measurements. That and suspension manufacturers quoted lift heights really mean jack shit

Here it is with about 650 lbs in the rear, again, counting the spare, and with a 1" spacer in the front making for a 4" lift in the front:

I appreciate the side view photos. For reference what size tire do you run? Assuming those are 37's? Looks like the HD springs loaded down are still higher than the SD option. I'm right in the middle and needing to decide to shock up or spring up.

Did you see my other post though about weights? (https://www.jeepgladiatorforum.com/...‘overlanding’-weights-and-implications.72463/). I did chat with AEV this morning about it and they were kinda blown away. Obviously there has been engineering done since Jeep now sells with full warranty the AEV 2.5 with HD springs as an option, so it must be 'ok'. But certainly something to think about when getting up to that 700#'s over GVW situation.

 

[BlueScapegoat]

I appreciate the side view photos. For reference what size tire do you run? Assuming those are 37's? Looks like the HD springs loaded down are still higher than the SD option. I'm right in the middle and needing to decide to shock up or spring up.

Did you see my other post though about weights? (https://www.jeepgladiatorforum.com/forum/threads/gladiator-‘overlanding’-weights-and-implications.72463/). I did chat with AEV this morning about it and they were kinda blown away. Obviously there has been engineering done since Jeep now sells with full warranty the AEV 2.5 with HD springs as an option, so it must be 'ok'. But certainly something to think about when getting up to that 700#'s over GVW situation.

Those are 37" Coopers, yes.

When you say "shock up or spring up" are you just saying you have some money to burn so it's one or the other, or are you considering coilovers? I'm certainly not trying to talk down to you but just want to make sure you know shocks don't have an affect on ride height, I've seen that mistake before.

I'm sort of surprised to see that damage on that Jeep, makes me wonder if it was bump stopped properly or not, or if there was "bottoming out" of either the coils or the air bags to produce impacts with enough force to do that to the coil mounts.

Then again, I have peeled factory welds off of frames before with nothing more than an air chisel so I'm not entirely surprised. I'll be sure to inspect for damage, running heavy offroad always has risks and I just plan to plate/gusset anything that seems suspect or is showing signs of fatigue. But I know people run way heavier than I do, as well.

 

[chorky]

Those are 37" Coopers, yes.

When you say "shock up or spring up" are you just saying you have some money to burn so it's one or the other, or are you considering coilovers? I'm certainly not trying to talk down to you but just want to make sure you know shocks don't have an affect on ride height, I've seen that mistake before.

I'm sort of surprised to see that damage on that Jeep, makes me wonder if it was bump stopped properly or not, or if there was "bottoming out" of either the coils or the air bags to produce impacts with enough force to do that to the coil mounts.

Then again, I have peeled factory welds off of frames before with nothing more than an air chisel so I'm not entirely surprised. I'll be sure to inspect for damage, running heavy offroad always has risks and I just plan to plate/gusset anything that seems suspect or is showing signs of fatigue. But I know people run way heavier than I do, as well.

Yes I'm well aware how suspension works and functions. I am at the weight that is edging closer to the HD springs. So what is happening is the SD springs, on certain types of bumps, compresses hard, then rebounds harder so it gives the feeling similar to the 'rubicon bounce'. The best option is for adjustable shocks, something like this (https://www.northridge4x4.com/part/...bypass-shock-rear-passenger-side-2-4-5in-lift), however heavier springs would also suffice. But my current setup, with a heavily weighted rear end, I sit perfectly level - no rake, no squat. But just not sure that I want to drop $4K on shocks.

I too was surprised to see that damage on their JLU but they have put on a LOT of miles. I find it a little suspect that one picture appears to show some rust on the inside of the weld itself - and they live in eastern Canada (not sure what specific area) so they see tons of road salt. Still surprising. however, seeing as how Jeep offers the AEV lift from the factory I would think (if it was ordered that way) it would be covered under warranty. Still kinda crazy how that happened.

 

[BlueScapegoat]

Yes I'm well aware how suspension works and functions. I am at the weight that is edging closer to the HD springs. So what is happening is the SD springs, on certain types of bumps, compresses hard, then rebounds harder so it gives the feeling similar to the 'rubicon bounce'. The best option is for adjustable shocks, something like this (https://www.northridge4x4.com/part/...bypass-shock-rear-passenger-side-2-4-5in-lift), however heavier springs would also suffice. But my current setup, with a heavily weighted rear end, I sit perfectly level - no rake, no squat. But just not sure that I want to drop $4K on shocks.

I too was surprised to see that damage on their JLU but they have put on a LOT of miles. I find it a little suspect that one picture appears to show some rust on the inside of the weld itself - and they live in eastern Canada (not sure what specific area) so they see tons of road salt. Still surprising. however, seeing as how Jeep offers the AEV lift from the factory I would think (if it was ordered that way) it would be covered under warranty. Still kinda crazy how that happened.

Ok gotcha. I was trying to combat that continued bounce, especially when towing and going over expansion joints and dips in the road, in conjunction with ride height. I replaced the coils first to get the load handling then figured I would replace shocks if/when I need to. Surprisingly, the factory Fox shocks control the coils perfectly well. I do suspect I'm probably overworking them though.

In most instances when people complain about bounce and sway I recommend shocks, but in this case, when it's brought on by sheer mass, I think coils first is the proper approach. I think the truck rides now pretty similar to how it did when stock and unloaded on the original equipment. It feels much more sure-footed.

My intention will probably be to get a set of Foxes tuned by somebody like Alltech, eventually. But until then the factory shocks seems to control the heavier truck and HD springs just fine.

I had a Raptor not too long ago, got rid of it in preparation for the Gladiator. I do miss me a set of bypasses lol

 

[Teqsand]

I was facing the same problem and here's your best bet for the best resolution: call Deaver Spring
https://deaverspring.com/

They are located in your neck of the woods (Santa Ana) and they will make custom springs based on the load you are going to be carrying.

My fully loaded overland setup was sagging my stock Rubicon rear springs. Rather than "guess" or rely on some vendor's statement that "it should be fine", I had the place that installed my lift work with Deaver Spring to custom build springs designed for the weight that I was carrying. I can't tell you the actual cost, but it was only a $600 upcharge on the lift when I had it installed.

Here's some pics:
Stock (not a great pic but you can see the minimal gap in the rear wheel well)

After (2.5" lift with the Deaver Springs)

That was 2+ years ago and I have had no issues with the rear end sagging or the rear tires rubbing.

Yes, you could buy one of the lift makers (AEV, Clayton, etc.) springs that "should" work, but it is just a guess because they weren't built with your load in mind. Deaver will make what you tell them you need.

EDIT: I should note that Deaver built my springs to handle 900# - 1200#

Deaver doesn't do 4" so this is not an option

 

[HooliganActual]

Deaver doesn't do 4" so this is not an option

Did you reach out to them? I mean their web site really doesn't show much but it does show 5-1/2" springs. In fact, it doesn't even show the springs I got from them....because they were custom.

There are other companies that do custom springs as well.

 

[Teqsand]

Did you reach out to them? I mean their web site really doesn't show much but it does show 5-1/2" springs. In fact, it doesn't even show the springs I got from them....because they were custom.

There are other companies that do custom springs as well.

If I have to pull teeth to get information I move on. Like EVO not willing to give spring specs, as if PLUSH & HD are some form of standard ....

 

[HooliganActual]

If I have to pull teeth to get information I move on. Like EVO not willing to give spring specs, as if PLUSH & HD are some form of standard ....

What is pulling teeth? Make a phone call. They are a company that makes custom springs. If you are expecting to just go to the website and see what you want, that's not going to be the case.
It's 3 simple steps:

1) Call them​

2) Tell them that you need Gladiator springs for a 4" lift and XXX lbs of payload​

3) Give credit card number​

​

Personally I don't care if you use them or not; but if I had a shop that makes custom springs in the same area code that I live in, I wouldn't feel the need to look any further.

 

[3VOLVE]

Have you thought about reaching out to Clayton? They offer an HD rear for overlanding or folks who carry additional weight all the time.

 

[Teqsand]

Have you thought about reaching out to Clayton? They offer an HD rear for overlanding or folks who carry additional weight all the time.

When I checked thier website they top out at 3.5'

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