"HL Falbaum" wrote

Not to belabor the point, but the two vehicles in my experiment were
similar size, weight, overhang. The real difference was suspension
stiffness. A soft '98 Chevrolet Tahoe, and a (about same year) Ford
Expedition. The Ford had a stiffer suspension and more precise steering.
The Chev was soft and more "loose", the sway always started at about
70mph. The Tahoe was replaced with a '03 Avalanche---stiffer suspension,
tighter steering. Same trailer was then towed without sway at any speed.

Interesting. In my case, a Chevy Citation vs a CJ, and the CJ certainly had
the stiffer suspension, and it was worse. I think the tighness of the
steering may be playing a bigger factor than we are giving it credit for.
--
Jim in NC