Are Weight Distribution Hitches required.

Submitted: Tuesday, Jul 19, 2011 at 21:01
ThreadID: 87662 Views:6954 Replies:6 FollowUps:5
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What I would like to know is what do WDH's actually do & are they required on all vehicles for large caravans?
We had a Jayco Swan a few years back that we bought second hand. It came with a WDH. The previous owner had a commodore sedan & always used the hitch.
We used it once & never again. We found it wasn't worth the effort of putting it on. We towed it with a Patrol Wagon with heavy duty suspension & the Swan was only a lightweight van.
We also used the Patrol to tow (at separate times) a 2.2 tonne boat & a 1.5 tonne single axle trailer carrying quads without a WDH & they both towed fine.
At the moment we have a Hilux 2 door ute, which is a much lighter vehicle & are thinking of buying a van up around the 2 tonne mark.
The tow ball weight on the towbar of the Hilux is a max of 225kg.
Will a WDH be required or can I change the suspension on the car to compensate for the extra load?
Your thoughts please
Fatso
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Reply By: Fatso - Tuesday, Jul 19, 2011 at 21:03

Tuesday, Jul 19, 2011 at 21:03
Should have mentioned it is a 4x4 Hilux 2 door ute
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Follow Up By: Member - Rod N (QLD) - Wednesday, Jul 20, 2011 at 05:54

Wednesday, Jul 20, 2011 at 05:54
What is the towing capacity of the ute? You can't go over the manufactures ratings, as per the handbook, no matter what modifications you do to suspension etc.
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Reply By: Motherhen - Tuesday, Jul 19, 2011 at 21:23

Tuesday, Jul 19, 2011 at 21:23
Hi Fatso

The WDH distributes the weight more evenly across your rig, rather than just carrying it on the rear wheels. It keeps you firmly planted on the road and less chance of losing control of your vehicle in unexpected adverse conditions. Beefing up your suspension may be necessary to tow a heavier van, but it will in no way substitute for a WDH.

Read tip 5 on the link:
WDH



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Follow Up By: Motherhen - Tuesday, Jul 19, 2011 at 21:31

Tuesday, Jul 19, 2011 at 21:31
Refer to page five in this document:Vehicle Dynamics
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Follow Up By: Fatso - Wednesday, Jul 20, 2011 at 08:18

Wednesday, Jul 20, 2011 at 08:18
Thank you Motherhen.
The link on vehicle dynamics is very interesting.
It is good reading.
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Reply By: Geobserver - Wednesday, Jul 20, 2011 at 08:59

Wednesday, Jul 20, 2011 at 08:59
Not sure of the name, but my 'hitch' is a series of bars that attach from the trailer into a tow ball fitting. Really easy to set up.

I use it towing a camper trailer with a Commodore sportwagon. The difference bewteen using one or not is very noticeable. The trailer does not bounce around at all and feels much more as one with the car. A significant imporvement in handling, especially as I am able to get along the highway at 100 - 110kph. Although the trailer is not that heavy, the rear of the car visually sags without the hitch and I'm sure saves the suspension.

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Follow Up By: Fatso - Wednesday, Jul 20, 2011 at 20:57

Wednesday, Jul 20, 2011 at 20:57
Thanks Geobserver
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Reply By: Grinner - Wednesday, Jul 20, 2011 at 10:38

Wednesday, Jul 20, 2011 at 10:38
Hi Fatso,

I have a 2000 Prado with heavy duty springs all round, and up until recently had a Eagle outback camper. I didn't use a WDH with the Eagle, it caused the back of the car to sag about 10 - 15 mm, front end didn't lift at all, and I think the ball weight was around 110 kg. I did feel at times that the front end felt a little light and vauge.

We have just picked up an Expanda poptop, with an empty ball weight of 150 kg (factory weighed). I did buy a WDH for it. (EAZ Lift 600 lb). We towed it home with out the WDH, and it towed OK, but again had that feeling of the front of the car being light.

I spent some time the other day setting up the WDH, taking measurements as I did it.

When I hooked up the van (fully loaded), the height of the towball dropped 40 mm, the rear suspension dropped 20 mm and the front suspension lifted 15 - 20 mm.

After connecting and adjusting the WDH, the rear suspension was now 5-10 mm sag, and the front suspension sag was back to 0 mm sag.

Driving felt alot better, none of the vaugeness or lightness felt in the front end, and very little of the "see-saw" from the back when going over bumps etc.

So in my opinion, I think the WDH has been worth it, I feel much safer driving when towing, and for $550, probably compares in price to the cost of changing the car suspension.

Jason
AnswerID: 460394

Follow Up By: Fatso - Wednesday, Jul 20, 2011 at 20:57

Wednesday, Jul 20, 2011 at 20:57
Thanks Jason.
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Reply By: Nomadic Navara - Thursday, Jul 21, 2011 at 00:02

Thursday, Jul 21, 2011 at 00:02
I have just been looking at the latest issue of the RACQ vehicle towing mass guide. It quotes th requirements from most manufacturers. It quotes Toyota specifying that for a Hilux - "load level hitch required." A load level hitch required is another name for WDH. I suggest you do what the manufacturer suggests.




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Reply By: Fatso - Friday, Jul 22, 2011 at 18:19

Friday, Jul 22, 2011 at 18:19
Thanks all. My questions have certainly been answered.
Fatso
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