[Richard]

Dan,

I know nothing about the traction control function, that may be a question for Newell. If, and that is a big IF, the traction control momentarily applies the rear brake to the opposite wheel than the one the computer thinks is spinning, then that intermittent braking on one side would cause the coach to behave badly.

All of the coaches I have driven with the ZF suspension have been superb.

Here are some things to check:
Alignment. The coach must be at the proper ride height for setting toe in. The independent front suspension is insanely sensitive to changes in ride height that will effect toe in. If the coach is toed out, it will dart from side to side like it has a mind of it’s own. Easy way to check, is to lower coach below travel height, put in travel mode and allow to settle, roll forward 10 or 15 feet, measure toe with tape measure.

Steering gear box. Too loose can cause lost motion in the steering. Too tight can cause the steering to stick and not return to center which produces an EVIL handling coach.

Play in the u joints in rod that connects the steering column to the steering gear box.

Loose steering gear box on it’s mounts.

Worn out lower bearing in steering gear column.

Loose front wheel bearings.

Worn out track bar in the REAR.

Some Newell’s had a rubber isolator in the middle of the shaft that connects the steering column to the steering gear box. When it softens it induces a great deal of free play in the steering.

My I ask some questions about the behavior?

If you are on a heavily crowned road which pulls the coach to one side, does it wander less?

If you are on a dead flat and smooth road is it worse?

How does it behave when a truck passes you?

At what speed does the wander start?