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Old 07-10-2019, 11:50 AM   #1
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Tweaking WDH

On our current trip, I weighted my F150 and single axle MicroLite 19fbs at a CAT scale.


Results were (GAWR / ACTUAL):


Steer axle: 3150 / 2720 (under 430lb)

Drive axle: 3300 / 3480 (over 180 lb)

Trailer axle: 3500 / 3440 (under 60 lb)


My thinking is that if I tighten the WDH chains, more weight will be transferred from the TV rear axle to the front. However, I don't want to push the trailer axle much further. When tightening the chains, will most of the weight transfer take place on the TV side, or will it affect the TV and TT equally?
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Old 07-10-2019, 12:26 PM   #2
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First off, you have really low axle weight ratings for an F-150. Mine are way higher but it may be how mine is equipped.


As far as how much weight get transferred, it's a geometry math problem. If the distance between the hitch and the front axle of the truck is the same as the distance between the hitch and the center of the trailer axle, the identical amount of weight will be transferred. If they are different, it will be a ratio. If you transfer 100# of tongue weight 50# would go to your front axle and 50# would transferred to your trailer axle. If the ratio different, the shorter distance will get more of the weight and you can just use the ratio to determine it.


Are you sure the axle is only rated for 3500#? I was looking at the GVW of your trailer and it is over 3500#. Of course wouldn't be the first time they rely on the tongue weight to take some of the weight instead of the axle.


EDIT: made some changes to my post after looking at your trailer specs.
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Old 07-10-2019, 01:01 PM   #3
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What year F150? My 2009 that was not equipped the best for towing had a GVWR a little over 7K and the sum of the axles were 300-400lbs higher then the GVWR.

What is the max weight on the truck tires? It is possible the factory tires were the limit. I you can find the axle part number it could be higher.

as it is just make very small changes and maybe shed some cargo
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Old 07-10-2019, 01:01 PM   #4
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You need to weigh your vehicle and trailer with the WDH attached, then with the WDH not attached to determine if you're putting enough weight back on the front of your vehicle. Just comparing your current weight to your truck limits doesn't tell you the entire story.
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Old 07-10-2019, 01:04 PM   #5
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I ran into a similar issue when towing with my Explorer. Overloaded TV rear axle, overloaded TT single axle. The dealer tech had set the WDH perfectly by the manual. All measurements were proper by the manual. I just started removing all the extra stuff we were hauling but didn't use out of both TT & TV. A lot of stuff for the grandchildren that weren't traveling with us at the time, five chairs for two of us, metalware AND plastic ware for eating (mostly plastic now), 3 sets of sheets, five towels each, etc. Yes, even towels, bath sheets, add up weight! I pulled 10# of towels alone out. I had enough stuff to survive a week or two in the TV, cut that back a lot. Stopped hauling firewood, too.
That's changed big time with a new truck but I still have to be aware of the TT single axle load. Mine is 3500# too. TT rated at 3877#, IIRC. Assumes tongue weight amount and that the TV is carrying that. In my case I can carry a bit of some of the previous TT load in the truck bed.
I have the standard towing package with the 5.0 V8 and 3.55 gears. My front axle is rated at 3375#, rear at 3800#. GVWR 7000# was actually listed like a package option on the window sticker.
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Old 07-10-2019, 01:09 PM   #6
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Quote:
Originally Posted by babock View Post
Are you sure the axle is only rated for 3500#? I was looking at the GVW of your trailer and it is over 3500#. Of course wouldn't be the first time they rely on the tongue weight to take some of the weight instead of the axle.
EDIT: made some changes to my post after looking at your trailer specs.
I have the same TT with the same axle.
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Old 07-10-2019, 08:58 PM   #7
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Originally Posted by HangDiver View Post
I have the same TT with the same axle.
Hope you guys don't run 14" load range C tires.
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Old 07-10-2019, 10:06 PM   #8
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Hope you guys don't run 14" load range C tires.
It came with Cs from the factory. Now the TT has 14" load range D Carlisle Trail HDs.
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Old 07-10-2019, 10:22 PM   #9
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If it were my trailer, I would go with a bigger axle, springs and 15" tires. Amazed they put no margin in, especially on a single axle trailer!
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