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  #97  
Old 09-15-2014, 02:27 AM
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Re: Quadra Lift

Unloaded at 2.5t, fully loaded up to 2.8t.

The suggestions also include adding a water tank (80kg), putting independent suspension in the van, adding 20" wheels, or replacing the car with a Limited without Quadra Lift.

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  #98  
Old 09-15-2014, 06:47 AM
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Re: Quadra Lift

So your tongue weight should be between 225 to 280kg.

I wouldn't be looking for problems with the tow vehicle before I got the weight distribution sorted out.

On some trailers it is possible to move the axel forward or back to shift weight off or onto the tongue.

From Jeep owner's manual;

"Trailer And Tongue Weight
Always load a trailer with 60% of the weight in the front
of the trailer. This places 10% of the GTW on the tow
hitch of your vehicle. Loads balanced over the wheels or
heavier in the rear can cause the trailer to sway

s
everely side to side which will cause loss of control of the vehicle
and trailer. Failure to load trailers heavier in front is the

cause of many trailer collisions. Never exceed the maximum
tongue weight stamped on your trailer hitch."



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  #99  
Old 09-16-2014, 01:40 AM
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Re: Quadra Lift

Thanks, I have been of the opinion there was too little weight on the tow ball, hence my thinking of adding a water tank.

Jeep Service suggested today that I remove the WDH in total and they think it will settle down. More questions to Jayco and Jeep.
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  #100  
Old 09-16-2014, 07:06 AM
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Re: Quadra Lift

Since the tongue weight is a known issue in your case, I would strongly recommend taking care of that issue first. Removing the WDH doesn't seem like an appropriate solution at all.

Maybe, just as a test, you can get some bags of sand, concrete, or other heavy items and load them into the caravan until you have the right tongue weight. Take it for a ride and see what happens. If it doesn't solve the problem you can just take them out and move on to something else. If it does solve the problem, as I believe it will, you can then look for a permanent method to distribute the weight.

Your water tank idea sounds pretty good. That way depending on what other cargo you have on board, you can adjust the tongue weight by adding or removing water.

Let us know how you make out.

Best of luck!


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  #101  
Old 09-16-2014, 08:28 AM
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Re: Quadra Lift

Quote:
Originally Posted by MrHerbert View Post
Jeep Service suggested today that I remove the WDH in total and they think it will settle down.
Strange when you consider that they specify using WDH over 3500 lbs or something like that in the manual...
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  #102  
Old 09-16-2014, 10:03 AM
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Re: Quadra Lift

Well that spec is likely based on what an appropriate ball weight would be for a trailer that heavy overall. A WDH redistributes the ball weight, not the total trailer weight. As mentioned, the ball weight is disproportionately low, so it's not entirely ridiculous to try without the WDH effectively unweighting things further. It perhaps exploits the rebound performance of the suspension as the trailer lifts the rear of the car over undulations?

Theories aside, I agree that step one has got to be getting the ball weight right. A water tank, if valved so you can choose whether you draw from it or the other tank/s, does provide good scope to manage the varying fore and aft weight of the caravan.

Anecdotally, our new caravan was a bit light up front and seemed to porpoise the car quite significantly when towing it home from the dealer. However given consideration, it was fully liquid loaded just behind the axle and most of the unused dry storage is well ahead of the axle... so it became more correctly balanced as I loaded it up. In subsequent use it behaved much better.

Regarding the questions posed... higher should be firmer with QL, but that's not much use in practice as you automatically get Aero above 80km/h. Changing to 20" is unlikely to make a difference... unless your 18"s are grossly under-inflated.

Cheers,
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  #103  
Old 09-16-2014, 11:01 AM
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Re: Quadra Lift

WDH must also be adjusted properly...
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  #104  
Old 09-16-2014, 07:01 PM
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Re: Quadra Lift

And the correct size...
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  #105  
Old 09-17-2014, 05:17 AM
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Re: Quadra Lift

Peoples, thanks for these comments.

I will make calls tomorrow to Jayco first. Adding weight by an additional water tank sounds logical but means I carry 80kg for the sake of it where loading the van differently may change things. I just don't think I have 80kg of stuff to move forward. Jeep wanted a test drive today with a couple of different setups but that is too difficult.

I really cant do anything until we head out for a trip next week. It appears I am going to be trialling setups on the road. Not ideal.

Tyres in Jeep are at 36lb with nitrogen, so should be stable. I will up them to 38 before we go.

So my steps will be:
1. Tyres to 38
2. Check ball weight
3. Determine whether to run without WDH and only Sway bar
4. Trial with and without WDH and or sway bar
5. Trial in sport mode only
6. Get price to change over to a non Quadra lift version

Have I missed anything?
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  #106  
Old 09-17-2014, 05:40 AM
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Re: Quadra Lift

I have quadralift on my 4x4 Summit. I like it, but man is it an "america tuned" ride. The little M-B GLK we have has a nice but firm ride. Really wish "sport" firmed it up but it doesn't. My favorite setting is Off-Road1. I like the firmness of that setting, but alas it goes away after a certain MPH (50 mph is it?).

Anyone 'firmed' up the ride in normal modes?
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  #107  
Old 09-17-2014, 05:46 AM
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Re: Quadra Lift

When you speak to Jayco, see if the axel can be moved toward the back. This would put more weight on the tongue without adding total weight.

Running without WDH or switching from QuadrLift seem absurd, compared to taking care of your basic, very common problem.

But, it's your unit, so do whatever you want ... but try to be safe!


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  #108  
Old 09-18-2014, 05:02 AM
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Re: Quadra Lift

Bill_de,

Well you got to the question where I started.
How do you increase the firmness of the ride in 'normal' mode.
Does not appear to be possible and it appears the common response is that any changes are not recommended by Jeep.
The only concession I have obtained is that it is possible to lower the normal mode, which I did see somewhere in one of these threads. Again the warning was not recommended.
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