Maintaining my GF's Overlander - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 12 (permalink) Old 10-06-2018, 03:38 PM Thread Starter
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Join Date: Oct 2018
Location: Clifton Park, NY
Own a Commander?: Yes
Model year: 2008
Trim Package: Overland
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: 221,500
Posts: 6
Maintaining my GF's Overlander

Hello, My girlfriend loves the Jeep but today it got too bad to drive. Good thing she bought a new vehicle as a primary, the Jeep can sit in the driveway until it's fixed.



It has a couple issues (2008 5.7hemi.) A coolant hose that feeds the heater core (just at the firewall) is leaking. The hose fittings look unique. Can anyone tell me about replacing those elbows?


Also the front end is grinding like CRAZY. Today, I thought it might lock up. It would stop grinding when accelerating, but start with the decel. It's not the brakes and I doubt it's the wheel bearings. But I'm confused how a front diff would go bad on a Jeep that's never been put in 4wd.
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post #2 of 12 (permalink) Old 10-06-2018, 04:49 PM
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Join Date: Jun 2013
Location: California
Own a Commander?: Yes
Model year: 2006
Trim Package: Limited
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: 175,000
Posts: 473
Garage
The T fitting on those coolant hoses is pretty tough to find, but they leak pretty regularly. The two hoses have part numbers 68000976AA and 68000977AA, and as far as I know they come as a single piece with the hose and fittings.

XKs are full time 4wd systems. If you've never changed your diff fluids, your diff could very well be grinding itself apart.
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2006 XK Limited, Hemi, QDII
245/70R17 General Grabber AT2s
Ported/Polished Throttle Body
Flowmaster Super 44
Stock Height Again (For Now)
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post #3 of 12 (permalink) Old 10-06-2018, 04:50 PM
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Quote:
Originally Posted by GF'sHemi View Post
But I'm confused how a front diff would go bad on a Jeep that's never been put in 4wd.
Well, for one thing, it is full-time 4WD. In other words it is always in 4HI, with the option to put it in 4LO when needed. Do you have any warning lights in the instrument display? Also, check for codes and let us know what you find.
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2006 Steel Blue 5.7L HEMI Limited 4x4 Build Date: June 9, 2006 Hour 14
Interior: Dark Slate/Light Graystone with Saddle Brown Leather Seats
Quadra-Drive II, NAV, DVD, Trailer Tow Group IV, Off-Road Group II, Remote Start, UConnect, Rear Backup Camera, Chrome Wheels,
Magnaflow cat-back exhaust, Daytime Running Lights enabled, 2" Rough Country Lift with 265/70R17 Goodyear Wrangler AT/S
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post #4 of 12 (permalink) Old 10-06-2018, 06:41 PM
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Join Date: Oct 2015
Location: East Coast of Florida
Own a Commander?: Yes
Model year: 2008
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Current Mileage: 102,100
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Quote:
Originally Posted by GF'sHemi View Post
Hello, My girlfriend loves the Jeep but today it got too bad to drive. Good thing she bought a new vehicle as a primary, the Jeep can sit in the driveway until it's fixed.

It has a couple issues (2008 5.7hemi.) A coolant hose that feeds the heater core (just at the firewall) is leaking. The hose fittings look unique. Can anyone tell me about replacing those elbows?

Also the front end is grinding like CRAZY. Today, I thought it might lock up. It would stop grinding when accelerating, but start with the decel. It's not the brakes and I doubt it's the wheel bearings. But I'm confused how a front diff would go bad on a Jeep that's never been put in 4wd.
@GF'sHemi;

Welcome to the forum; Post some pics of your GF's Commander when you can. Unfortunately, her XK is pretty up there in mileage and inevitably, things will start to fail and/or break. And as @jeep5253 pointed out already, your XK is in 4-HIGH all the time, so, it's not hard to see how the Front Diff could go bad. Here are some links to help you out with future repairs and/or upgrades to your GF's XK;

Chrysler/Jeep Factory Parts: http://www.factorychryslerparts.com/...ukey_make=1064

Cheapest factory Parts: Find OEM BMW, Fiat, Ford, GM, Mopar, Nissan, Subaru & Toyota Parts & Accessories

JeepinByAl: JBAoffroad.com

JustforJeeps.com - http://www.justforjeeps.com/?gclid=C...9i0hoCSS7w_wcB

Rough County lift kits - Suspension Lift Kits, Body Lifts, Leveling Kit, 4x4, Jeep, Chevy, Dodge, Ford, Off-road Truck | Rough Country Suspension SystemsŪ

AFE: Advanced FLOW Engineering | Engineered Adrenaline

CARiD.com - http://www.carid.com/?gclid=CjwKEAjw...NrrxoCEBbw_wcB

Bilstein shocks & struts - Home

The Steel Armadillo - Jeep Commander (XK/HK) 2006-2010

WAM Custom Bumpers - https://wambumpers.com/

4WheelParts.com - Truck Parts & Jeep Parts - Lift Kits, Winches, Tonneau Covers, Tires, Wheels, Bumpers, Performance ? 4 Wheel Parts

RockAuto - http://www.rockauto.com/en/catalog/j...catalog%2Fjeep

Also, please read this if you haven't done so already - lots of good information in here;

REQUIRED READING!!! New Member Introduction post & other important new member info.

Thanks and again, welcome aboard.
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Last edited by Big Blue; 10-06-2018 at 06:45 PM.
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post #5 of 12 (permalink) Old 10-07-2018, 08:37 AM Thread Starter
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Join Date: Oct 2018
Location: Clifton Park, NY
Own a Commander?: Yes
Model year: 2008
Trim Package: Overland
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: 221,500
Posts: 6
Thank's for the info and the links. This will be very helpful. I'm told that the diff fluid was changed at regular intervals, but no receipts were saved. I insisted that the "no need to save receipts" ethos be changed right away. I did not realize that the system was full time 4wd. Interesting.

Thanks again everyone.
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post #6 of 12 (permalink) Old 10-07-2018, 10:39 AM
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Join Date: Aug 2018
Location: NY
Own a Commander?: Yes
Model year: 2007
Trim Package: Sport
Power-Train: 4.7L V-8
4WD
If 4WD - system: QT-II
Current Mileage: 170k
Posts: 84
Is it possible that the front grinding is actually the front driveshaft cv joint? The one at the transfer case goes bad quite commonly. The boot breaks and water gets in and it eventually dries up and grinds to dust.
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post #7 of 12 (permalink) Old 10-08-2018, 09:59 AM Thread Starter
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Join Date: Oct 2018
Location: Clifton Park, NY
Own a Commander?: Yes
Model year: 2008
Trim Package: Overland
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: 221,500
Posts: 6
Oops. I mistakenly listed this Commander as Quadra-Trac II. It's not, it's a Quadra-Drive II.

Last edited by GF'sHemi; 10-08-2018 at 10:00 AM. Reason: spelling upgrade
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post #8 of 12 (permalink) Old 10-08-2018, 01:17 PM
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Join Date: Jun 2013
Location: California
Own a Commander?: Yes
Model year: 2006
Trim Package: Limited
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: 175,000
Posts: 473
Garage
Quote:
Originally Posted by GF'sHemi View Post
Oops. I mistakenly listed this Commander as Quadra-Trac II. It's not, it's a Quadra-Drive II.
That adds another potential problem; QDII not only requires regular diff oil changes, but also a specific LSD additive from Mopar. It's possible that the additive wasn't added when serviced, causing the grinding.

2006 XK Limited, Hemi, QDII
245/70R17 General Grabber AT2s
Ported/Polished Throttle Body
Flowmaster Super 44
Stock Height Again (For Now)
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post #9 of 12 (permalink) Old 10-09-2018, 06:14 PM
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Join Date: Jan 2016
Location: Columbus OH
Own a Commander?: Yes
Model year: 2007
Trim Package: Limited
Power-Train: 5.7L V-8 Hemi
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Current Mileage: 125000
Posts: 14
Quote:
Originally Posted by Carbuff View Post
Is it possible that the front grinding is actually the front driveshaft cv joint? The one at the transfer case goes bad quite commonly. The boot breaks and water gets in and it eventually dries up and grinds to dust.

I agree with this. My CV joint went bad at 112,000 miles. Welcome to the money pit!
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2007 Commander Limited 5.7 Hemi 125,000 miles
Superchipped F5
2" OME Lift, JBA Upper Control Arms
17" Jeep JL rims with 1" spacer
P255/75R17
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post #10 of 12 (permalink) Old 10-10-2018, 12:35 PM Thread Starter
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Join Date: Oct 2018
Location: Clifton Park, NY
Own a Commander?: Yes
Model year: 2008
Trim Package: Overland
Power-Train: 5.7L V-8 Hemi
4WD
If 4WD - system: QD-II
Current Mileage: 221,500
Posts: 6
Quote:
Originally Posted by CMH-XK View Post
I agree with this. My CV joint went bad at 112,000 miles. Welcome to the money pit!

What were the symptoms when your CV joints went bad?
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