If you can't see or measure a difference in axle to frame or axle to house, I'd do one of these:
if this was a DIY install contact the mfr. If a third party install go to them.
Mark, Jean, Paul & Lizzy (the mutt)
1997 Fleetwood Southwind Storm 34LS >
Thirsty, noisy & clunky. She ain't pretty, but she sure is fun! "Aerodynamics are for people who can't build engines." Enzo Ferrari
Have you weighed the coach, what is on that side, gen, holding tank, water tank, it could be a lot of things, balance is everything. On ours everything is on the driver side of the coach, holding tanks, bath room, kitchen, and me. There are springs shops that will weigh the coach and can adjust the springs to balance, the problem is sometime you will be empty and some time full, that is where the air bags come in, if you have an on-board air pump you can adjust the air to balance as things change. You didn't say how much the coach leans, have you checked for a broken spring, shackle, anything bent.