SWAY: it's not just about trailers and hitches - TV set up
Iíve read many posts about sway problems. Issues included are: weights of axles, hitch set-up, tires & tire pressures, tv ratings, vehicle CGVW, etc.
One item i rarely see mentioned is tv wheel alignment! Having a vehicle that both tows and does snow plowing, is an enlightening experience.
When the height of a vehicle changes in the front, so do the settings of the wheel angles. i have found that the wheel 'toe' angle is very noticeably changed and felt. Different front suspensions react differently to a greater or lesser degree.
In an ideal setting, a tv wheel alignment is best done at actual riding height of the vehicle while towing. One way of duplicating the pitch is to weight the rear of the vehicle and raise the front to 'real driving height'. I got a strange look when I asked for the toe to be checked when the plow was on the truck but it showed that while the plow was off, the settings were within range but with the plow on, the reading changed to a less desirable angle. I clearly wasn't adding enough ballast in the rear to balance the truck. It made quite a difference in handling.
This explains part of why a weight distributing hitch improves sway so much. Besides not overloading one axle, it reduces the steering angle changes that make the steering feel loose.
any comments or opinions are welcome