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Old 03-26-2016, 02:04 PM
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Quadra Lift Setting when Towing?

Just purchased a 2015 Summit. We do a lot of trailering with both travel trailer and sailboat. Neither the dealer or Jeep Customer Service could tell us the answer to these questions:

1. In what setting should the Quadra Lift system be set when towing the trailer?

2. Is the Quadra Lift system compatible with a weight distributing hitch -- or even eliminate the need for a WDH?

After a long time on the phone with a customer service agent who kept reading the information in the user manual about how to set the system when the Jeep itself is towed, she finally acknowledged that there was no information about our question. When pressed to refer me yo someone who could answer this question, she finally agreed to send the inquiry to someone who would take up to a month to answer!

Strange that neither the dealer or Jeep Customer Service can answer basic trailering questions for a vehicle designed to pull 7200 lbs.!

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Old 03-26-2016, 02:25 PM
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Re: Quadra Lift Setting when Towing?

#1
You don't really have a lot of choice. When you get up to certain speeds ....down the QL goes. I guess you can put it in sport for better shift points...then you'll be low all the time.
Is there a way to over-ride the QL?

#2
I still think a WDH set-up is good to have on a heavy trailer.
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Old 03-26-2016, 02:43 PM
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Re: Quadra Lift Setting when Towing?

Leave it in "normal" mode.

WDH is actually required for loads over 3500 lbs and is perfectly compatible with QL.
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Old 03-26-2016, 03:57 PM
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Re: Quadra Lift Setting when Towing?

The recommendation to use a WDH when towing (export models) a mass greater than 2260kg is clearly documented in the owners handbook we get, in the Towing section. Pretty sure it will be in yours too, as previously pointed out.
Sounds like your customer service is about as uninformed as we have experienced, but this model has had a long run now so there's really no excuse.

QL isn't and can't be a replacement for weight distribution.

You'll initially set up your hitch in normal mode, and that's what you will use for towing. If you don't know how to do this then you'll need a bit more research on this forum.

The QL will lower into Sport height once you are above about 85kph, 60 odd mph. This has the effect of slightly adding tension to the WDH, no biggie at speed anyway.
You also have the alternative of towing in Sport mode, which will immediately lower the vehicle and change the transmission shift points - something I do when travelling in hilly country.
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Old 03-26-2016, 04:00 PM
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Re: Quadra Lift Setting when Towing?

As others have said you should use a WDH. When setting it up have the set at normal road height.
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Old 03-27-2016, 10:03 AM
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Re: Quadra Lift Setting when Towing?

Quote:
Originally Posted by Climbzmountain View Post
1. In what setting should the Quadra Lift system be set when towing the trailer?

2. Is the Quadra Lift system compatible with a weight distributing hitch -- or even eliminate the need for a WDH?


Strange that neither the dealer or Jeep Customer Service can answer basic trailering questions for a vehicle designed to pull 7200 lbs.!
Automatic. It should also be set up when the Jeep is at NRH and not Sport Mode. It only lowers 0.5" at highway speed which really isn't much. The slight extra tension will only help at speed in cross wind or bus/ tractor "bow wave".
QL is completely compatible with WDH use. Nothing eliminates the need for WDH.
Not surprising since the people answering the phone at JCS are only there for the most common of questions. It's not like they pay enough to have an engineer sitting there. The dealer also does not do trailering. Their thing is the vehicles themselves. You'll likely get the same (or worse- wrong, I've experienced it) answer at Ford or Chevy. Best bet for proper set up is a RV dealer. That is their thing- setting up tow vehicles. It's not like air ride is a new thing on passenger vehicles.
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Old 03-27-2016, 02:21 PM
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Re: Quadra Lift Setting when Towing?

WDH should be set up in TIRE CHANGE MODE!!

I posted a lengthy thread in how to properly set up a WDH some time back.
In short, you need to measure wheel arch heights front and rear on your JGC in Tire Change Mode and then set the WDH up adjusting it and ensuring you have the same height differential between the front and rear as near as dammit. Use the same methodology on your trailer. Measuring front and rear frame heights to ensure you have the same height (as near as dammit) the same as your JGC. You can the put your QL back into Auto and it will adjust accordingly.
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Old 03-28-2016, 06:48 PM
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Re: Quadra Lift Setting when Towing?

I think he was asking about being under way. Not setting up the hitch.
However, what you say is interesting. Where did you find that process from?
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Old 03-29-2016, 06:16 PM
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Re: Quadra Lift Setting when Towing?

Quote:
Originally Posted by The Evil Twin View Post
I think he was asking about being under way. Not setting up the hitch.
However, what you say is interesting. Where did you find that process from?
I'll take a "SWAG" (scientific wild-assed guess) and say that by being in tire changing mode, the self levelling mode will temporarily be de-activitaed, so the car will stay level, and won't start trying to level itself, while you're trying to adjust the tongue load........maybe??
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Old 03-29-2016, 08:42 PM
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Re: Quadra Lift Setting when Towing?

Quote:
Originally Posted by leadfoot4 View Post
I'll take a "SWAG" (scientific wild-assed guess) and say that by being in tire changing mode, the self levelling mode will temporarily be de-activitaed, so the car will stay level, and won't start trying to level itself, while you're trying to adjust the tongue load........maybe??
Makes some sense though. Technically that's how they would set up a standard suspension essentially. Tension the bars to bring the front down.
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Old 04-05-2016, 02:22 PM
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Re: Quadra Lift Setting when Towing?

Good info here! I won't be pulling anything heavier than about 2750 pounds (unless we get a new trailer!). So I should be good without a wdh. Good to know the proper process!
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Old 06-09-2016, 09:52 PM
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Re: Quadra Lift Setting when Towing?

Hey All,

I have a related question to this. When setting up the hitch, should you drive around a bit first for the self leveling to kick in before final adjustments or are you good just setting it up stationary?

Thanks!
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