From what I had on my old rrc, throw the thing away, once they age they normally dont work properly and sag the back end, if you are uprating the suspension anyway, it will fight to adjust it to its own setting
Just check the price of the new ones on paddocks :shock:
The idea of the system is to level the height of the back end under loaded conditions. Uprated springs and shocks, will cancel out the benefits of the thing.