Boxcar Bill,
I have never had a set of Williams trucks fall apart on me. I think that you mean K-Line heavy weights when they first cam e out did that.
Anyway I have trouble with the Crown Edition six car passenger set with dummy or fixed couplers as these will jump even on a straight track at low speed.
The truck sets, from the Crown Edition era, that look like they have K-Line center rail rollers work a whole lot better. These will hold the track and roll along smoother.
Lee Fritz