Rick,
What is important here is an understanding of what you are specifically talking about. It is likely your coach (like mine, Hector's, Jim C's) has what Prevost called a stabilizator system.
You likely have 6 shock absorbers outside on the drive and tag axles. Inside the position of the shock absorbers on the drive axle will be the hydraulic cylinders that look like a shock but which have small diameter plastic hoses connected to them. The way the stabilizators work is they serve to keep the rear of the coach from drooping when tag axle air is dumped automatically during a sharp turn. The steering mechanism up front has a cam which senses when the steering wheel is turned to the extreme right or left. When the cam actuates a switch it automatically dumps tag axle air, while simultaneously applying hydraulic force to the stabilizators so the rear of the chassis does not drop as tag axle air is dumped.
When Prevost came out with the 45 foot coach making sharp turns was facilitated by dumping tag axle air automatically, but unless the coach had stabilizators the rear would settle down. Ordinarily that is not an issue, but if the coach was pulling out of a driveway for example it might make the rear drag on the ground, hence the option for stabilizators. I am surprised the Prevost guy actually was aware of the feature. In the past we have found very few parts or service people did not even know of the feature.
If I remember right these are rebuildable. Perhaps Hector can jump in because I think he did rebuild his. BTW most owners are unaware that their 45 foot coaches may dump tag axle air automatically and when required to make sharp turns they often will lift the tag axle. Doing so is not only not necessary, but when that occurs I believe the stabilizators are not engaged.