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Unread 02-12-2008, 07:28 AM   #1
richsei
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Are they the same ESP and 4-Wheel Traction

I have a 05 Grand Cherokee Laredo 4wd with Quadra-TracII. I would like to know if ESP and 4-wheel traction control is the same thing and also can you change a QT-II to a QD???

Richard

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Unread 02-12-2008, 08:09 AM   #2
LJS8510
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http://www.wkjeeps.com/wk_esp.htm

http://www.wkjeeps.com/wk_4x4.htm

Quadra-Trac II
The Quadra-Trac II 4 x 4 system gives owners the benefit of the NV245 active transfer case and BTCS. The transfer case is the same one used in the Quadra-Drive II system. It takes input from a variety of sensors to determine tire slip at the earliest possible moment and take corrective action. The system also uses Throttle Anticipate sensing quick movement in throttle from a stop and it takes steps to maximize traction before tire slippage even occurs.

Torque is transferred to the individual wheels as needed by the BTCS to maintain traction in changing road conditions. When the system senses tire slip, it modulates brake pressure to the slipping wheel, which directs torque to the tires with the best traction.

Quadra-Trac II features an electronic shift mechanism for ease-of-use. The transfer case also includes a neutral position for trouble-free towing behind another vehicle.


Quadra-Drive II
The Quadra-Drive II Jeep 4 x 4 system offers owners the ultimate in off-road capability. It combines the NV245 full-time transfer case with Electronic Limited Slip Differentials (ELSD) for best-in-class tractive performance. The system instantly detects tire slip and smoothly distributes engine torque to the tires with traction. In some cases, the vehicle will even anticipate low traction and adjust to proactively limit or eliminate slip

The heart of the system is the NV245 active transfer case. This transfer case includes a center differential coupled with an electronically controlled clutch pack, varying it from a completely open state to completely locked, and infinite possibilities in between. The 4-Low gear ratio is 2.72:1.

Quadra-Drive II features an electronic shift mechanism with a unique engagement lever. The lever is conveniently located on the shift console. Pulling the lever up engages 4-Low. The lever returns to a resting position after activation. The transfer case also includes a neutral position for trouble-free towing vehicles, such as behind a motor home.

A key component in the Quadra-Drive II system is the ELSD an industry first application and the new benchmark for automatic traction differentials. The ELSD use electronically controlled clutch packs to automatically and instantly vary from slip to lock at each axle. This maximizes traction when needed without any of the on-road drawbacks normally associated with such a robust 4 x 4 system.

All components of the system work together, continually monitoring needs, to provide smooth and automatic application of the components for best-in-class tractive performance while improving the day-to-day on-road driving experience. For example, the ELSD releases the clutch packs in the front axle during turns to allow differentiation and prevent crow hop.

This site has a lot of info
http://www.wkjeeps.com/kmenu.htm
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Unread 02-12-2008, 01:07 PM   #3
2007GrandDiesel
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Here's a video of ESP in action http://youtube.com/watch?v=NiZjeeMExY4
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Unread 02-12-2008, 06:13 PM   #4
2008OverlandCRD
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It's a good video, but if you watch closely the ESP disabled vehicles are traveling slightly faster and the driver makes no attempt to correct the slide.

No doubt that ESP works and works well, but the video looks slightly biased in my opinion.

Don't get me wrong, I like having ESP (no not extra special powers), but look closely at this video on when each vehicle passes each cone and when the vehicle starts sliding look at the way the tires are turned, definitely not into the skid.

I think it would be prohibitively expensive to add the ELSD's and any other related components. I really have no idea of the cost, but I doubt it would be worth it for the price.

Last edited by 2008OverlandCRD; 02-13-2008 at 02:22 AM..
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Unread 02-12-2008, 06:39 PM   #5
richsei
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Thanks for the info and the video link. I just hope its as good as they say the Jeep that is.. The snow gets deep out in Colorado at times..
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Unread 02-13-2008, 05:19 AM   #6
2007GrandDiesel
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I have played with my ESP a couple times on gravel and a couple times in snow, and it does a pretty good job of sorting things out. I don't know proper driving techniques, so the ESP is a good thing for someone like me
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Unread 02-21-2008, 07:17 AM   #7
richsei
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I'm still trying to find out if ESP and 4-wheel traction control is the same thing ?
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Unread 02-21-2008, 07:28 AM   #8
2007GrandDiesel
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Quote:
Originally Posted by richsei View Post
I'm still trying to find out if ESP and 4-wheel traction control is the same thing ?
No they are not:

http://en.wikipedia.org/wiki/Traction_Control

http://en.wikipedia.org/wiki/Electro...bility_Control
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Unread 02-21-2008, 07:36 AM   #9
richsei
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is there a light on the dash for the ESP or how do I tell if I have it??
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Unread 02-21-2008, 09:16 AM   #10
Texas WJ
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All WK's should have it I believe.

There's more about the system here.
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