So this is my first Dodge. It's an 07 3500 with the 5.9 automatic. Suspension rides pretty rough, initially I thought it was just because of the type of vehicle it is. However after looking it appears that the
airbags on the rear are pretty low and or deflated completely. I'm assuming this would have a lot to do with the ride, looking for input on PSI to inflate them to? Thanks for all the help

 

Guess what? This is a truck and consequently does ride rough unless you put a load in the back.

I am a bit puzzled about the airbags that you mentioned. Are these airbags in place of the springs at the back, or are they in addition to the springs? Sounds like an after market addition to level the truck with a load. Does your truck have a compressor and an air tank to fill these air bags? Do you have a control and one or two gauges in the cab to inflate the airbags?

If these are after market airbags, I would not leave them totally empty with no load, but would inflate them with 2 or 3 psi, just enough to keep their shape. From experience, if the bags are left empty, in time a crease or two could develop and then crack on the sharp crease.

See my signature for what I did to make the empty ride smoother. It ain't no Caddy ride, but is a LOT smoother now.

 

I'm no stranger to rough-riding pickups LOL. I wasn't expecting a Cadillac ride when buying a 3500. These do seem to be aftermarket because I've never seen them on another rig before. They sit next to the leaf springs in the back and there appears to be a hose running from them to either side of my license plate with a stem to manually fill them there is no air compressor or air tank. I was just a little puzzled by them and wondered if they would ease the ride or if they were four more of a heavy load situation. The only experience I have with airbags are on semi trucks and ambulances. Thanks for the quick reply I appreciate it

 

Sounds like an after market load leveler. Filling them with no load will tend to jack up the back of the truck and make for an even rougher ride. Experiment and let us know what you discovered. Still would keep them at 2-3 psi with no load.

I went with the Carli springs on the rear, but they did not improve the ride as much as I expected. A bit softer than OE, but not enough for the rear seat passengers. Then I added the Kelderman airbags at the rear in place of the rear shackles. That made a huge difference. I have on board air and controls in the cab, so can level the truck as needed. Or lower it a lot if I need to go into underground parking. This is what I have on the back: https://kelderman.com/shop/2003-2009...air-suspension

The front no longer has any coil springs as I threw them out and installed airbags. https://kelderman.com/shop/2003-2009...air-suspension

 

Cool thank you. I'll keep this in mind as i can afford to do things to it. Helps a lot thank you. I'll mess with them and see what a little air does.

 

Try reducing the air pressure in the rear tires with no load. I only run 40 lbs in the back. The improvement in ride quality is substantial.

 

Carli and Thuren offer softer riding front coils and some entry level shocks.
Minipaks in the rear help some. Ditto on Mexstan's suggestion to keep a few#'s psi in the bags. Empty trucks don't need a whole lot of air if they're E-rated. 50 front and 40 rear works well.
This company offers advice and carries a bunch of suspension options.

http://www.cjcoffroad.com/1994-2012-...sion-s/255.htm