There are several other threads here about suspension upgrades, so you can do a search and get various opinions/info.
Here was my approach on my Chateau 31E:
1. First get a good alignment. You want at least 5 degrees of positive caster. On some you will need to have camber/caster sleeves installed to get that much caster, but mine was already at +5 degrees.
2. I installed bigger Hellwig swaybars front and rear.
3. I installed a Saf-T-Plus steering controller.
These changes made a big difference in the driveability. No more wandering around the lane, better steering feel, much less getting pushed around when semis pass. Went from white-knuckle driving to a much more relaxing drive.
My next step will be to install Bilstein HD shocks, but I'm pretty happy with the current handling so it isn't a big priority.
The big 32' class C's like ours tend to be very heavy at the rear, so I think beefing up the rear springs would also help a lot, but I haven't done this. Either add a leaf to the springs or add some sort of helper springs or air bags.
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