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  #49  
Old 10-10-2015, 09:11 PM
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Re: Quadra Drive II vs. Quadra Trac II

My understanding is that the rear end is physically larger for the Hemi and EcoDiesel and that provides the room for the ELSD. That's independent of the "can it (v6) handle it" question...

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  #50  
Old 10-10-2015, 09:50 PM
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Re: Quadra Drive II vs. Quadra Trac II

Quote:
Originally Posted by Jim_in_PA View Post
My understanding is that the rear end is physically larger for the Hemi and EcoDiesel and that provides the room for the ELSD. That's independent of the "can it (v6) handle it" question...
Yes, I understand that. And it still connects to the TC by a driveshaft. What's in front of the TC doesn't have an impact on the physical size of the rearend.
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  #51  
Old 10-11-2015, 10:24 AM
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Quote:
Originally Posted by MDBones View Post

Yes, I understand that. And it still connects to the TC by a driveshaft. What's in front of the TC doesn't have an impact on the physical size of the rearend.
But the physical size or design of the rear differential may not accommodate the locker. It could be an issue with the carrier break too that the gearing for the V6 requires a carrier that is different than the carrier for the gears needed for the Hemi/Diesel.
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  #52  
Old 10-11-2015, 10:50 AM
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Re: Quadra Drive II vs. Quadra Trac II

Quote:
Originally Posted by CJ8Rockcrawler View Post
But the physical size or design of the rear differential may not accommodate the locker. It could be an issue with the carrier break too that the gearing for the V6 requires a carrier that is different than the carrier for the gears needed for the Hemi/Diesel.
What I'm saying is, what engine is ahead of the TC doesn't matter. That entire ELSD rear axle would still fit and connect up to the TC exactly like it would with the V8 or diesel.

If the Jeep site is accurate there are two axle ratios available on the GC...

3.45 or 3.09, with the 3.09 an option only with the V8. There shouldn't be any issues with the carrier.
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  #53  
Old 10-14-2015, 02:01 PM
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Re: Quadra Drive II vs. Quadra Trac II

Quote:
Originally Posted by MDBones View Post
I would agree with that if you were looking at QD in its original versions.

QD originally had the QTII TC and used Vari-Lok progressive front and rear diffs. That system split power front to rear and side to side so any one wheel could receive up to 100% of the power.

The second version of QD switched from Vari-Lok to front and rear ELSD's.

In both of those versions I could understand it only being available with the V8.

Today's version of QD is basically QTII with an open front and ELSD rear. It relies on traction control to help make up for the lack of a front ELSD. I fail to see how the 3.6L wouldn't be capable of handling a rear ELSD.
It's not about power.

It's about not having to apply it to get torque. When you can simply let off the brake and have the engine start pulling, it means the other tricks never come into play that might with a smaller engine with less low end grunt.

Smaller engines need more RPMs to get more power. That means potentially developing more wheel spin. An engine that can move a large load at idle speed will move itself over an obstacle with much less gas peddle being applied.

That can help avoid slipping and bogging.
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  #54  
Old 10-14-2015, 09:06 PM
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Re: Quadra Drive II vs. Quadra Trac II

Sorry, that still doesn't excuse the lack of it for me.
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  #55  
Old 10-24-2016, 02:22 PM
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Re: Quadra Drive II vs. Quadra Trac II

Excellent info here! I found this older thread and thought it is funny that the new 2017 Jeep Grand Cherokee V6 with the Off Road package now includes the QD II with the rear ELSD. I guess Jeep figured out how to do this with a V6.

I am looking to sell my 2014 Overland V6 for the 2017 Overland V6 with the Off Road package. We'll see how it performs.

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  #56  
Old 10-24-2016, 03:52 PM
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Re: Quadra Drive II vs. Quadra Trac II

Please no more photos of Max Steel JGCs.
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