OME AAL or Airlift suspension.

mcunningham25

New member
Air bag articulation?

Add a leaf systems always produce a harder ride because they force arch the springs to increase spring rate. If you always carry a heavy load, perhaps it would not be much of an issue. if you switch back and forth with loads, the air system is superior. Don't think it will necessarily deprive you of articulation. At least one TJ Jeep in Australia is outback racing on airbag rear suspension without coils, just the bags, and does fine.

If you place them on the outside like the pics in the article you will limit the travel by however tall the bag is. The last thing you want to do is overstretch a bag. If you have some fab skills the best way to get both worlds is to put one bag in the center over the pumpkin. This will require some fabrication as nobody makes a kit for this right now. This has been done on alot of trail rigs that are the daily drivers and :smiley_drive:proves to be a great way to do it. Like I said you will need to know how to do your own fab work on this. Please be sure to use a Bellowed or Convoluted bag for this ad not the other.
 

ExpoMike

Well-known member
So, just to bounce this to the top, I ordered and received my airbags this week. I did a custom kit, that was the XJ kit, minus bags, then I added bags that were longer but same diameter. Just shy of 10" max travel.

I am hoping this weekend I will get them install and post up pics. This project got bumped to the top of the list after our Death Valley trip and my trailer mods. I added two holders and gas cans to the front of the trailer. This added a fair amount of weight to the tongue and was causing the Jeep to dip to about 2-3" off the bump stops (which are lowered by 2"). Before the addition gas cans, I would only occationally hit the stops but on that trip, it was much more frequent. Even the wife said it was time to do it.

I'll post up a new thread when I get it done and give my opinions then.
 

XXXpedition

Explorer
you can alway add airbags if you need to.
i had some on my xj and loved them help keep the truck level... mine were airlift. the xj kit and bags from a full size truck - sim. to mike...
IMG_7538.JPG
 

Root Moose

Expedition Leader
Sorry if this is a n00b Q, I haven't read up on the air bags.

What does a system like that do to axle articulation?

Is it a barely perceptible thing or it pooches the flex you had?
 

ExpoMike

Well-known member
I really comes down to how much air you have in them. They need a minimum of 10psi so there will be a slight increase in "spring rate" but articulation should not be affected. As you move up to the max 100psi, it will stiffen up the spring rate and will change how much effort it takes to flex what you have. No different then having a heavier rate spring. It is not limiting flex, only how much effort it takes to do so.

As long as your airbag is a correct lenght to not limit articulation, all you are doing is adjusting the spring rate with air. The more air, the higher the rate, the stiffer the spring. Now if you have added weight to the vehicle which offsets the added air, you should not see any difference in flex or ride then unloaded without added air.

Not sure if that clears it up any?
 

ExpoMike

Well-known member
you can alway add airbags if you need to.
i had some on my xj and loved them help keep the truck level... mine were airlift. the xj kit and bags from a full size truck - sim. to mike...
IMG_7538.JPG

Funny, your old XJ was what inspired me to go with airbags in the first place. I found a few others since then but you were the first I saw.

I am using the Airlift brand and had gotten an airbag chart from Airlift a couple years back. I was told what bag was in the stock kit (which is a 4.0 diameter bag) and just started looking over the list. Found one that fit my needs and custom ordered my kit. I am really excited to get this finally done and I know towing the Kamparoo is going to be so much more enjoyable without having to cringe each time we bottom out the rear end.
 

Root Moose

Expedition Leader
I follow what you are saying.

I suppose there is no reason why you couldn't set them up independently so that you can increase the spring rate in the down hill side when off-camber?
 

ExpoMike

Well-known member
I follow what you are saying.

I suppose there is no reason why you couldn't set them up independently so that you can increase the spring rate in the down hill side when off-camber?

If you had everything setup with an on board compressor and correct valves, you could do this but I can't recall anyone in the 4x4 world really have done this. Most helper bag setups tend to be manual fill as needed. Quick and simple.
 
If you place them on the outside like the pics in the article you will limit the travel by however tall the bag is...... If you have some fab skills the best way to get both worlds is to put one bag in the center over the pumpkin.....

Regarding flex loss (or percecption of it); it seems that a single bag over the differential is a bit extreme.

I was thinking of using both, but closer to the center (inboard of the fram rails at least), probably just outside the differential, but not a single one directly over the differential.

Based on what I'm reading here though, it's probably not necessary at all if you can order the kit components that fit your flex/weight/size needs.

Anyone mind posting what the kit cost them?
 

ExpoMike

Well-known member
Not including the expedited shipping since I needed it this week, the custom kit was ~$260. I think a stock out of the box kit can be found around $225 but I haven't looked that hard.
 

BPage

Adventurer
Not including the expedited shipping since I needed it this week, the custom kit was ~$260. I think a stock out of the box kit can be found around $225 but I haven't looked that hard.

Are you saying that a custom airbag setup only cost 260?
I'm confused?
Air bags replace coils? Do you still need shocks? Do yo have to install a compressor?

If you swap out air bags (if that's how they work) do you get a better ride when they aired down and more lift support when aired up?

:REOutCampFire03:
 

ExpoMike

Well-known member
Are you saying that a custom airbag setup only cost 260?
I'm confused?
Air bags replace coils? Do you still need shocks? Do yo have to install a compressor?

If you swap out air bags (if that's how they work) do you get a better ride when they aired down and more lift support when aired up?

:REOutCampFire03:

Not all of us are using coil springs in the back. :elkgrin:

These are "Helper Airbags". They do not replace anything but add to the leaf springs.

I just posted my install and pictures to view.
http://www.expeditionportal.com/forum/showthread.php?t=36091
 

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