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Old 08-19-2013, 10:56 AM   #1
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2004 Jeep rear Lube ?

Hi all, could you all suggest a rear axle lube for my 2004 Grand Cherokee with qudra trac all wheel drive ? It has 62 K miles, and the rear end is grinding/growling on a turn,,, I'm used to old hot rods with a posi, but don't think this is good .... Should I do a fluid change to synthetic ? Is there a additive I should add to this vehicle ? Guess I need to keep it a few more years, instead of a Ram diesel pickup...
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Old 08-19-2013, 12:29 PM   #2
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My guess/take is if its already making noise it's too late . You need to find a shop that specializes in Rear Ends at get it fixed right before you hurt more parts. But if you want to do a check for yourself, drain the rear end grease into a clear container and look at the bottom for fine metal particles ( silver color) . You might have to let it sit for a day or so to let the suspended particles settle to the bottom. Some have magnetic drain plugs that catch the particles, other you just have to remove the rear cover and if yours is that way , once grease had drained look into bottom of housing for particles. Hope this helps !
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Old 08-22-2013, 05:02 PM   #3
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My guess/take is if its already making noise it's too late . You need to find a shop that specializes in Rear Ends at get it fixed right before you hurt more parts. But if you want to do a check for yourself, drain the rear end grease into a clear container and look at the bottom for fine metal particles ( silver color) . You might have to let it sit for a day or so to let the suspended particles settle to the bottom. Some have magnetic drain plugs that catch the particles, other you just have to remove the rear cover and if yours is that way , once grease had drained look into bottom of housing for particles. Hope this helps !
There IS an additive specifically for the "quadrant rack" 4 wheel drive differential .. The carrier gear will 'ratchet' without it, causing slippage and noise . I can't recall what is called however ,, Jeep dealer?
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Old 08-22-2013, 07:01 PM   #4
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The synthetic fluid in this case is far superior to the old stuff. Most bottles for the syn stuff say that no friction modifier is needed, for applications where it is required.

Some manufacturers claim that the syn is lifetime fill from the factory.
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Old 08-23-2013, 06:31 AM   #5
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Thankyou Very much for the info everybody ! I really appreciatte it. Might as well look in to going the synthetic route as it looks like I'm stuck with it a while longer...
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Old 08-23-2013, 09:55 AM   #6
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Sorry, "Quadratrack"
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Old 08-24-2013, 07:29 PM   #7
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Sorry, "Quadratrack"
Thankyou,,, I see the newer synthetic lubes say they are good with "limited slip" type rear ends... Should I still go back to a Jeep dealer for high priced lube ??
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Old 09-02-2013, 12:07 PM   #8
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Well poo... Changed the gear oil out yesterday with Castrol synthetic made for limited slip rear ends. My freind says I still need the additive, so another trip to town this morning, got home and read the fine print on the bottle, "Not for use on Jeep Quadra tracs" ... grrrr... Guess I'll have to go to the dealer... Maybe tomorrow...
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Old 09-02-2013, 12:18 PM   #9
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Well poo... Changed the gear oil out yesterday with Castrol synthetic made for limited slip rear ends. My freind says I still need the additive, so another trip to town this morning, got home and read the fine print on the bottle, "Not for use on Jeep Quadra tracs" ... grrrr... Guess I'll have to go to the dealer... Maybe tomorrow...
The Quadra Trac is a function of the transfer case, there is the equivalent of a possi unit in there. For a friction modifier for the rear diff., what you picked up should be fine. Just don't think about adding it to the T/case.
Jeep, Quadra Trac fluid, is all you need for the t/case , no additives.

EDIT; The Quadra trac , system is very sensitive to tire sizing, tire rotation at every oil change helps keep the tires wearing evenly. Factory spec's call for tire circumference within 3/8". With 1/4" preferred. Installing 1 new tire after a flat or replacing front tires, only , due to alignment wear , will cause the system to throw a fit. Usually , overheats and packs it in.
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Old 09-02-2013, 12:26 PM   #10
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The Quadra Trac is a function of the transfer case, there is the equivalent of a possi unit in there. For a friction modifier for the rear diff., what you picked up should be fine. Just don't think about adding it to the T/case.
Jeep, Quadra Trac fluid, is all you need for the t/case , no additives.
Really? It does say Don't use it in the transfer case, or with any ATF... I'd hate to hurt something expensive... I'm old school, not so up to date on this newer stuff... Like you said, I really didn't see anything in the rear end that was different than my Mopar hot rods... Thanks for the reply Skip !!!!
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Old 09-02-2013, 12:34 PM   #11
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Oh ya, the stuff I got is K&W Trans-X . Anybody use this before ??
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Old 09-02-2013, 12:44 PM   #12
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Just back from the web site , in Q&A , someone already asked the question about Quadra Trac , and were referred to the help line.
1-877-283-2623
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Old 09-02-2013, 12:53 PM   #13
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Just back from the web site , in Q&A , someone already asked the question about Quadra Trac , and were referred to the help line.
1-877-283-2623
You are Amazing !!! I'll call as soon as I finish my burger...
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Old 09-02-2013, 08:22 PM   #14
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You are Amazing !!! I'll call as soon as I finish my burger...
You were having burgers, and didn't invite everyone ......
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