I went from M to T as well no trouble but
I keep telling people here are three pressures almost guaranteed to be wrong
One is the one on the tire "Maxium pressure 110 psi at maximum load of xxxxx pounds. IS the correct pressure ONLY if the tires are at max load (mine were)
The second is the pressure on sticker 95 in my case (WRONG)
and the third is whatever the tire store puts in unless you are specific about the pressure and check it.
Odds are you need to adjust pressure first... Then think about other things.
NOTE: there could be other issues but let's try the FREE fix (Pressure) First... Oh you should have the rig weighed so you knwo the proper pressure in the tires.. RVSAFETY.com is I think the place to start if you want it done properly.
Also not all tire stores balance 22.5's Mine dropped a bag of beads in the tire.