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Air Suspension (another way to lift the suspension)

9.3K views 10 replies 6 participants last post by  Chidiver  
#1 ·
A number of people have posted about lifting their chassis, primarily to accommodate larger wheel/tire combos. My own goal was to counter the sag caused by the weight of my camper conversion. All the lift kits were expensive and were based on spacers and/or different coil springs, meaning they were not adjustable. You got what you got.

I just wanted to level the rear end to match the front when fully loaded for a trip, so I started looking for alternatives. There are not many US based aftermarket suppliers of Metris parts, but there are quite a few outside the US. I stumbled on a Youtube video from a company called Air Bag Man in Australia and I checked them out. They have a kit for which the only special tool needed to install is a Riv-Nut tool. I also had to fabricate the air valve holder, which I riveted to the underside of the trailer hitch bar. The price was under $1000, delivered DHL in under a week.

The install went just like in the video, though you can skip the spring compressor by simply removing the lower shock bolt and lowering the suspension with a floor jack. It is very well made, bolts right in and works really well.

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#5 ·
The reason for two air valves is that single valve systems allow air to move between the bags. When cornering, particularly with a full load, this allows the outside bag to compress and pass air to the inside bag, thus exacerbating body roll. It only takes a minute to set the ride height equally and isn't an issue.

These bags also have internal bottom-out stops. I liked the cost, the quality, and that they are bolt-on for the Metris.
 
#2 · (Edited)
Advanced RV used to install VB Air on Metris when they had their Metris upfitting business. It was expensive. I inquired back then, but I think they were on their way to ending their Metris business. They still install them on Sprinter etc and have additional custom shocks to make that system even better.


I believe you can also get a genuine MB air bag for the van. Part A4473280000

Also, just a general note of caution about this kind of thing. You can potentially really mess things up if these lose air. Like if you pulled a line or had a leak. The stops are no longer present. I'm just saying this in case you hadn't considered it.
 
#3 ·
Cool setup, but it seems like it would be hard to get each side to the same ride height. Has that been an issue?
 
#6 ·
How's the ride quality compared to stock? Can this be used to lower the height for when you want to go ride slammed? :cool:
 
#7 ·
Great job and install, I bet its awesome to level it just right at what ever payload. I too have been searching and found that kit a while back, at the time I thought 1000 was a little steep and held off on buying them. I dont like the sumo spring inserts too, that can not be good when your empty. Do you have any pictures of where you had to mount the rivet nuts? I will try to order the MB air bag and try to swap my springs out. would save me 400 or so over that kit.
anyways nice mod and thanks for sharing!
 
#10 ·
I ordered the Air Bag Man standard height rear air bag system for my Metris cargo and it is sitting in my home office waiting to be installed. They also make a lifted height system for those that want to gain a little ground clearance.

I am waiting to see which travel trailer I buy and how much it sags the rear of my Metris to see if I really need it. I have a rear air bag system on my Tacoma and love it, along with Bilstein shocks it really stabilized the rear of my Tacoma when hauling a couple of dirt bikes and all my gear.