Usually these chassis are designed for a long life, something like a million miles. How many miles on your MH? If you have less than 100,000 miles I doubt mechanical parts are worn out, if it has been properly maintained.
For me, if I watch the road right in front of the MH, I'm constantly correcting the steering/sawing on the steering wheel. If I look at least a couple blocks ahead when driving on interstates, the steering wheel stays steady for the most part, and I'm not constantly making adjustments.
Then again, your front tire alignment/toe-in may be out of specs., have you had it aligned recently? Tires will still wear evenly if other adjustments are correct, but the MH will wander or suddenly veer, depending on amount our of adjustment. How long since you've had it re-aligned or checked?
2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA 1SG, retired;PPA,Good Sam Life member."We the people are the rightful masters of both the Congress and the Courts - not to overthrow the Constitution but to overthrow men who pervert theConstitution. "Abraham Lincoln"