Forum Discussion
Ron_Gratz
Jul 21, 2015Explorer
Camper G wrote:If you are saying you will try to use the WDH to lift the rear of the truck back up to its unhitched height -- I think that is a very bad idea.
---I think this is pretty good and the weight bars should transfer any additional squat from the tongue weight when loaded back to the front axle.
What do you guys think?
Let's say your TT's loaded tongue weight is 750#. When the TT is attached with no WD applied, a load of approximately 300# will be removed from the steer axle, and a load of approximately 1050# will be added to the drive axle.
In order to lift the rear end back up to its unhitched height, the WDH would have to transfer 1050# off the rear axle -- with about 700# being transferred to the steer axle and about 350# being transferred to the TT's axles.
The net load changes would be: 400# added to the steer axle, 0# added to the drive axle, and 350# added to the TT's axles.
First, I think it would not be possible for your WDH to transfer 350# to the TT's axles, and even if it could, you certainly should not try to have the steer axle carrying 400# more than when unhitched.
I believe Chevrolet specifies that, if you use weight distribution, the WDH should be adjusted to eliminate about 50% of the TV's front-end rise which resulted from attaching the TT with no WD applied.
For the above example, where 300# was removed from the steer axle, the WDH should be adjusted to transfer about 150# back to the front.
If the WDH transfers 150# back to the steer axle, a load of about 220# would be removed from the drive axle.
This means the tongue-induced load on the drive axle would be reduced from the example 1050# to approximately 830#.
So, if you follow Chevrolet's instructions and restore 50% of the load which was removed from the steer axle,
the added load on the drive axle would be reduced to about 80% of what is was before WD was applied.
If the tongue weight, with no WD applied, caused the TV's rear end to drop by 2", application of WD per Chevrolet's specification would cause the rear-end drop to be reduced from 2" to about 1.6".
In short -- you should not try to use the WDH to eliminate the rear-end drop which resulted from application of tongue weight.
The WDH should not be used to control the ball height.
To control ball height, you should move the ball mount up/down on the drawbar.
If the holes in the vertical part of the drawbar are spaced at 1.5" intervals, you should be able to get the trailer tongue to be between 3/4" below and 3/4" above level.
Ron
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