how mutch w/weight distribution?

It depends on how the hitch is adjusted.

You should adjust the bars so the same amount of weight that was taken off when the tongue is placed on the ball is restored back to the front axle. That amount will depend on the weight of the trailers tongue and the distance from the rear axle to the ball. Some manufacturers suggest returning only a portion of the weight instead of all of it. I am of the opinion that all of it should go back on the front.
Barney

As noted, GM and Ford are not nearly as demanding as they used to be about front axle transfer on their pickups. Having said that, the Reese should be capable of restoring 100%, or more if desired. Remember the old advertisement where one was used to support the rear of the vehicle, with the tires removed? That was a Reese.

If you adjust it correctly zero tongue weight is carried by the front axle. It is a misconception that the WDH moves tongue weight to the front axle. Actually weight is removed from the front axle axle and that same weight (some or all) is moved back to the front axle via the WDH.

Ron3rd wrote:
It depends on how the hitch is adjusted.

Correct answer. It all up to you. But you can adjust it to put back, some, all, or more than was removed. My instructions say to get the front back down to where it was unhooked, and the rear should NEVER be higher than it was unhooked. In other words, don't raise the rear wheels off the ground.