I have a 1999 Ram 2500 4x4 LWB 8800lb gvw pickup, with the Z7B rear height sensing system. I am looking for the rear ride height valve unit it itself. I have a dodge part # of 52009873AA or 4404328. Does anyone have the part, or know anyone who does? I have attached a picture of the unit I am looking for. Any assistance would be most helpful.
Tom

 

Those guys were a pain when they were new, and there came a time when dealerships were just bypassing them, as opposed to repairing/adjusting them.

That said, used market is probably going to be your only other option. I don't think anyone has them new any more.