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post #1 of 9 (permalink) Old 11-01-2017, 11:23 PM Thread Starter
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Join Date: Nov 2017
Location: Dartmouth, NS
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Model year: 2007
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Power-Train: 5.7L V-8 Hemi
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If 4WD - system: QD-II
Current Mileage: 177000
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Ive been driving jeeps for about 20 years now...Just bought a 2007 Commander.. Ive already got a bunch of questions
When I bought it I was told it needed a new axle bearing turns out the front dif is shot. I don't have the time, place or knowledge to do a rebuild. My mechanic, a guy I trust is suggesting I get a used front Axle assembly and bolt it in. I'm trying to figure out the compatibility with other jeeps. What years for the Commander are interchangeable ? How about Grand Cherokee ? and is having the Hemi going to limit my options? I've been to the dealer and looked around on the internet but haven't been able to answer these questions. I appreciate any thoughts on this, want to get this sorted and not get sour on my new jeep.

Last edited by monkshouse9; 11-02-2017 at 10:56 AM.
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post #2 of 9 (permalink) Old 11-02-2017, 11:11 AM
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Join Date: Oct 2015
Location: East Coast of Florida; Proud to have served.
Own a Commander?: Yes
Model year: 2008
Trim Package: Sport
Power-Train: 4.7L V-8
4WD
If 4WD - system: QT-II
Current Mileage: 101,200
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Quote:
Originally Posted by monkshouse9 View Post
Ive been driving jeeps for about 20 years now...Just bought a 2007 Commander.. Ive already got a bunch of questions
When I bought it I was told it needed a new axle bearing turns out the front dif is shot. I don't have the time, place or knowledge to do a rebuild. My mechanic, a guy I trust is suggesting I get a used front Axle assembly and bolt it in. I'm trying to figure out the compatibility with other jeeps. What years for the Commander are interchangeable ? How about Grand Cherokee ? and is having the Hemi going to limit my options? I've been to the dealer and looked around on the internet but haven't been able to answer these questions. I appreciate any thoughts on this, want to get this sorted and not get sour on my new jeep.
Welcome to the forum @monkshouse9 ;

I'm fairly certain front axle assembly from any year Commander (2006 through 2010) will work - but since you are looking to replace the front differential, the only stipulation I would have, is to make sure it comes from a Commander that is equipped with the Quadra-Drive II 4WD system, since that's the 4WD system you have in your XK.


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Last edited by Big Blue; 11-02-2017 at 11:18 AM.
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post #3 of 9 (permalink) Old 11-02-2017, 11:30 AM Thread Starter
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Join Date: Nov 2017
Location: Dartmouth, NS
Own a Commander?: Yes
Model year: 2007
Trim Package: Limited
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: 177000
Posts: 3
Any idea about compatibility with the Grand Cherokee in the same years
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post #4 of 9 (permalink) Old 11-02-2017, 11:46 AM
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Join Date: Oct 2015
Location: East Coast of Florida; Proud to have served.
Own a Commander?: Yes
Model year: 2008
Trim Package: Sport
Power-Train: 4.7L V-8
4WD
If 4WD - system: QT-II
Current Mileage: 101,200
Posts: 5,509
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Originally Posted by monkshouse9 View Post
Any idea about compatibility with the Grand Cherokee in the same years
I know a lot of WK parts will fit and are interchangeable on Commanders but I'm not sure about the differentials.

In theory, I would think they should work if they come off of a WK that is within a couple of years of yours (06-08), that has the QD-II 4WD system.

But honestly, I'm not sure.

Give it a day or so and I'm sure somebody, that is more knowledgeable than me, will give you an answer.


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Last edited by Big Blue; 11-02-2017 at 11:51 AM.
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post #5 of 9 (permalink) Old 11-02-2017, 12:22 PM
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Depending on what they mean by front diff, if it's loose I'd check the front diff bushing, it's a pretty common wear item, it cost me $600 at a shop ($30 for part, couple hours labor, might be cheaper just to buy a new front diff)

There are two criteria that you have to be sure of when replacing a front diff -- A differential from a Grand Cherokee 06-10 WILL WORK, however, you need to make sure that you have:

A) correct gear ratio (3.07 for v6 or 3.73 for 4.7 and 5.7 v8 engines) AND
B) with or without electronic limited slip differential

If you have the Hemi, I'm almost positive you have the 3.73 gear ratio. I'm not sure about your status on limited slip, you'll have to find a build sheet or look in your manual to find that out.

Diffs are anywhere from 400-800 from a parts yard/ebay, around $1000 new.

2007 Commander Limited, 4.7L, 140k
Black with two-tone black/beige interior, fully loaded
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post #6 of 9 (permalink) Old 11-02-2017, 12:25 PM
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Join Date: Aug 2009
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Model year: 2010
Trim Package: Sport
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4WD
If 4WD - system: QT-II
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You need a QDII from any wk/xk they are all the same.

2010 5.7 QTII -
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post #7 of 9 (permalink) Old 11-02-2017, 01:08 PM Thread Starter
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Join Date: Nov 2017
Location: Dartmouth, NS
Own a Commander?: Yes
Model year: 2007
Trim Package: Limited
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: 177000
Posts: 3
Thank all, wish me luck at the salvage yards
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post #8 of 9 (permalink) Old 11-02-2017, 01:43 PM
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Join Date: Aug 2009
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Model year: 2010
Trim Package: Sport
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QT-II
Current Mileage: 180000
Posts: 338
Think my post crossed with Eric's... QDII would be ELSD and I think they are all 3.73

2010 5.7 QTII -
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post #9 of 9 (permalink) Old 11-02-2017, 01:51 PM
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Join Date: Oct 2015
Location: East Coast of Florida; Proud to have served.
Own a Commander?: Yes
Model year: 2008
Trim Package: Sport
Power-Train: 4.7L V-8
4WD
If 4WD - system: QT-II
Current Mileage: 101,200
Posts: 5,509
Garage
Quote:
Originally Posted by monkshouse9 View Post
Thank all, wish me luck at the salvage yards
Good luck and let us know how you make out.


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