If that’s the case your system is f dup. Have you actually measured it?
Measured what? If you're talking EMPTY ride height between ALT and NORM, yes I have measured it in response to your comments before and posted the numbers for you to see. There is even a Note in the owners manual about most 3500's not going into ALT without a load. There is going to be a minimum pressure in the bags, and without a load that minimum pressure will keep it higher than the lowered ALT height even with ALT selected.
It stands to reason that if the system cannot remove enough air to lower to ALT height that in ALT height it would ride higher empty than loaded, even with minimum air in the bags.
Dad’s ‘17 works identical. Doubt they both are broke the same....
There were also some spring changes between 15 and 17, thou I don't know if it's just the overloads or main leaves too.
What stuff lives in your bed all the time? Maybe you have 500 lbs of fixed cargo that I don't have.
Say you hitch up on some real awkward angles and the rear axle is all out of wack. It adjusts sitting like that. Now you pull onto the road. I can't see it keeping one bag near zero and the other highly inflated. You'd go down the road tilted. Prove me wrong please.
I agree that it will adjust for this, but to me that's not going down the road adjusting for the altitude/temp differences as mentioned earlier. Correcting for uneven terrain at loading would be corrected very quickly and at low speeds. That is not the same as adjusting pressure for a swaying load or climbing 5000'.
Every time I start the truck and begin driving I hear it purge air from the tank, likely to push any water out. It usually takes 100-200' from where I was stopped. It doesn't do it until I am driving. I would guess that it does a moving check of the load around this same time.
If you prove it 100%, I will start saving up to replace it with standard suspension.
I'd feel the same to find out it adjusts at 65 mph. I don't want it adjusting at highway speed for the same reason I plumbed the airbags on my 05 independently, it made for a more stable load and added to sway control.
If the system were to adjust at 65, and adjust fast enough to try to compensate/react to sway it would make for a very unstable ride with most any load.
I have found a few more references to road surfaces and shifting loads, and they are all under the description for payload/normal ride height. None list that under the ALT ride height description. I find that interesting.
I've got some feelers out to Ram on the subject... see if it gets anywhere.
I also wonder if the FSM has any additional info on it.
I won't be on the side of the road cause a bag is empty from a small air leak because the system won't keep air in it while on the move. That would be a very poor design.
Earl
You need to get past the small leak. A proper system will be leak free. It's not very hard to have fittings and lines that don't leak. The bags likely operate at less than 150 psi, and we have fuel systems operating at 26K psi without a leak.
If I have a leak I want to know about it, not let the system bandaid it
I will say that at the end of the day the way the auto-level handles weight is awesome. I'm right at my RAWR when I take the ATV's camping and it has minimal body roll, it's comfortable, and stable. So I guess either way it's working quite well, thou I would like to know more about how it adjusts.
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