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With any coach there are a couple of things to check.
1. Tire pressure - Over inflating can cause straight line stability. Using the chassis inflation placard numbers are a good safe default number. These are normally the pressure needed for the size tires as list to support the maximum axle load capacity. You could still be over inflated slightly but without knowing the coach weight the risk of dropping below what might be needed is best avoided. Prefered method would be to have the coach weight checked and set the pressures accordingly (with maybe 3-5 psi extra to account for changes in loading and such).
2. Weight balance - goes with getting the coach on a scale to set tire pressures. Individual wheel weight would be best for this check if you can find a scale that you can roll half the coach over. (see attached pic as an example). You goal is to try and balance the weight, as a percentage of axle capacity, front to back and left to right as best you can. A Cat Scale weight check is about $10.
3. Find Commercial Truck service center and have the alignment check. I don't know the numbers for your chassis but you could be within recommended alignment specs but to far in the wrong direction which can cause handling problems. If you're within the first year of ownership the chassis manufacture may do the alignment check for free as a warranty item so check with them first.
You next options will start costing $$$ with bolt on devices (track bars, steering stabilizers,,,) so do low or no cost stuff first.
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2006 Hurricane 31D built on a 2006 Ford F53
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