Huntindog wrote:
Try to imagine a tiny scale that would fit between the top of the ball and the coupler. What it would measure is the actual TW.... And that scale would read the same no matter what is done with WD.
Try to imagine that it won't...
Your hypotehtical tiny scale will actually read higher with a wdh engaged, as the moment applied to the connection increases the pressure as it tries to pick up the back of the truck and the front of the trailer.
Truck hitch will see less downforce, but that doesn't mean the pressure on the hitch ball is less when you're squeezing the hitch onto the ball with a wdh.
Although now I know why so many blindly buy these things. They don't have a clue of how it works....not to mention if they actually need it or not.