ret.ibew,
I'm pretty sure your air suspension and tag axle came from the Jet Co. My 97 has this system. If you do not have the manual for it, pm me with your email address and I'll send it to you. Generally, your tag compressor starts @ 90 psi or less and shuts off at 110 psi. At the shutoff point your ride height should be correct. Agree with bushing change to polyurethane, the OEM rubber ones should show obvious wear or be completely missing. Your front sway bar will NOT have the additional hole to R&R the down link. This mod has been come to be known as the CHF (cheap handling fix). Unfortunately it is not available to us older coach owners. New shocks and proper tire air pressure for the load you're carrying and slowing down on windy days will be your friend. However, our 16" wheels only have a max pressure rating of 90 psi ( I might be wrong on that #, so check your rim, it's stamped into it) so air pressure adjustments are small.
For me, with new shocks (6 total), new main and tag axle air suspension bags and proper air pressure in my tires, I float very comfortably, with one hand steering, on the open road. But with all these changes, high winds, passing semi's and a slow rollover an uneven surface my coach will rock! Just the nature of the beast as far as I can tell. Best of luck