EMD360 wrote:
Our 22' 350 has new tires but no other modifications and it drives easily. It appears you need to find an expert who will actually find and correct the problem.
Richard, that's good advice and what I would recommend also ... especially since your motorhome is only 22 foot, which I'm surprised has any handling problems. There is definitely something wrong there.
I have a 24' Itasca on the E450 chassis and on the door specifies 65 lbs. front, 80 lbs. rear, for tire pressures. Those are the pressures I use in the tires and it handles beautifully even though the motorhome loads the chassis well below it's maximum. I like tires inflated on the high side of what inflation charts specify because higher tire pressures lengthen tire life.
I did have it aligned after having the motorhome for awhile, but not because of any handling problems as it was OK since brand new. For the alignment they did have to add some beveled shims to the front suspension ... probably correcting what others have mentioned in this discussion.