I brought our trailer home with a '97 GMC 1/2-ton without a WD hitch, and the front end floated bad. Picked up an Equlizier 4-Way and set it up myself. It was a rock solid combination (except for the lack of power).
When we got the Dodge (sig), I ran it without the WD for a little bit. It handled just as good as the smaller truck with the WD in terms of stability during turns, wind, semi pushing while passing...
I installed the WD with the Dodge. I 'think' it helps a little bit with stability. Why wouldn't it? I'm not transferring much weight to the front axle at all, just getting tension on the bars. It does help with bouncing though. My truck is nearing shock replacement depending on how you look at it, but with the WD the bouncing caused by bridge transfers and rough roads is greatly reduced.
Is it needed? No, but it might help out in a scenario.
