Ya, the air bags usually have a dump switch that lowers the rear to the stops. Then you don't want to drive much like that since you don't have any suspension to absorb bumps. I use the dumps to get under my trailer hitch and then push the button and it lifts it back up to normal ride height and I don't have to crank the trailer tongue so much to hitch it. But, there must be some rear suspensions that will allow you to max the rear air bags and lift the back up to full up. I wonder about that. Seems like if you can dump it you should be able to max it.
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'03 Freightliner FL112, 295" wheel base, with '03 United Specialties 26' living quarters, single screw, Cat C12 430 h/p 1650 torque, Eaton 10speed , 3.42 rear axle ratio
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