Help confirm my next step in adjusting my weight distribution hitch...
I took my 2015 LC to the scales and weighed without the trailer (but with full tank of gas and two kids):
Front Axle: 3400 lbs
Rear Axle: 3680 lbs
... then I (and the two kids and virtually full tank of gas) went through the scales again with the travel trailer (2019 Keystone Bullet 2070BH) using the WD hitch (Equal-i-zer):
Front Axle: 3240 lbs
Rear Axle: 4360 lbs
Trailer Axle: 3900 lbs
My initial thought is that the WD hitch is not adjusted properly, as the front axle should increase in weight, not decrease, once the trailer is properly hitched. This is probably a blindingly obvious observation, but I am still trying to figure all this out.
If there is something I am missing, please let me know.
Thanks,
Scott in Kansas
You're sitting pretty.
Generally, the goal of WD is to restore ~50% of the front axle load rating (FALR).
Meaning the load restoration to the front axle will be 50% between no trailer (3400lbs), and hitched but without WD bars (guestimating ~3000lbs, based on 800lbs tongue weight and 2:1 wheelbase to overhang ratio). So hitched with WD bars attached at 3240lbs is just right.
The front axle will always decrease in weight with a load on the hitch ball. It acts as a teeter totter about the rear axle. Weight on the ball, reduces weight at the front axle. WD bars restore that to some degree.
Some people may run more FALR and it may feel better. But it's ill advised IMO. The point of a hitch is to articulate. Too much WD tension to restore FALR is basically building a stiff bridge between the tow vehicle and trailer. When it does need to articulate when entering driveways or ramps, will cause HUGE torsion loads on both the trailer and tow vehicle hitch/frame. It's a balance between sway resistance and articulation.
Several things you can do to improve sway resistance:
1) LT tires and more inflation pressure in tow vehicle tires to increase sidewall stability. It's also why I prefer to keep the 20" wheels for lateral stability under tow.
2) For the Equilizer, if you feel like you need more sway resistance, you can tighten down bolts that secure the WD bars at the head. Minimum is 60 ft-lbs torque. Factory is usually set to 100 ft-lbs.
3) Keep enough tongue weight in the trailer. Minimize weight behind the rear axle of the trailer.
4) By far the most important parameter is to keep the ball as close and tight to the rear bumper as possible. You've heard a good tow vehicle is one that has long wheelbase. The truth is that it's long wheelbase to short rear overhang ratio. Rear overhang defined by the centerline of the rear axle to ball distance. That one can control to a degree with the right drop shank. Which means avoid drop shanks with long horizontal projections. Remember teeter totter? A longer projection gives the trailer more influence to sway, porpoise, and reduce front axle weight and overall control.
I modified mine to bring it in as close and tight as possible, cutting off about 3" off the shank and drilling a new 5/8" for the hitch pin.