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  #37  
Old 11-25-2009, 12:01 AM
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Re: Axle oil change help.

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Originally Posted by TimmyB View Post
Just saying "Mopar" isnt the only oil or oil additive out there that will work. If you take it in to a local non-Jeep shop im sure they do not use Mopar oils, but have other brands/manufacturers that work.

Its like buying 5W-30 oil, can get the cheapest Walmart brand or an expensive
named brand, but if on the label it states its been tested and meets the same standards then there really is no reason to not use one or the other, they should perform the same. Some people just feel better buying named brand things that are priced higher because it gives them a sense of security.
I am yet to find another friction modifier out there that specifically states that it has been tested and approved for use in Chrysler axles equipped with the electronic limited slip diffs. If M1 came out with something, you can bet I'd buy it. Same thing with the TC fluid - no one makes anything that has been tested and approved for use in the NV247 that QDII uses, so I buy the mopar fluid. Mopar also recommends using their 75W-140 diff fluid but I don't because it is overpriced and I feel confident that M1 make a great product - and more importantly it has been tested and meets chryslers requirement for
use. Also mopar recommends using their brand of ATF+4 in the trans but I used valvoline synthetic because it's cheaper but still has been tested and is approved for use.

I'd rather spend 15 bucks on two bottles of friction modifier from the dealer and know that I'm putting the right fluids in a vital part of the drivetrain instead of cheapng out and ruining the diff.
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  #38  
Old 11-25-2009, 12:06 AM
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Re: Axle oil change help.

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Originally Posted by iJeep View Post
Im gonna go for that.. Thanks bro!
Have you said what 4x4 system you have? If you have QTI I don't think you needed to buy the friction modifier from the dealer. Also As said above if yo have QTI you can use ATF+4 in your TC and not the NV245/247/249 fluid
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  #39  
Old 11-25-2009, 12:11 AM
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Re: Axle oil change help.

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Originally Posted by mjl2610 View Post
I was thinking about changing the axle oil in the WJ, however i thought that this was a sealed compartment... And by using the synthetic gear oil why would it ever need to be serviced unless you are off roading/water fording and what not?
I was wondering the same thing ???
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  #40  
Old 11-25-2009, 12:16 AM
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Re: Axle oil change help.

For the WJ guys I'd go here

http://www.wjjeeps.com/service/maintenance_wj.htm
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  #41  
Old 11-25-2009, 12:21 AM
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Re: Axle oil change help.

I have a wk but I was wondering why does it need to be serviced if it's sealed ?

I can understand the wear and tear and the heat generated in a closed system like that with minimal heat loss and pressure changes can affect the chemical composition of the oil but changing the gear oil is usually unheard of ... iJeep mentioned every 30k ...

I am merely curious as this is the first time I have heard of doing it but I am going to give it a try this weekend ...
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  #42  
Old 11-25-2009, 12:39 AM
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Re: Axle oil change help.

Quote:
Originally Posted by LTrainGC View Post
Have you said what 4x4 system you have? If you have QTI I don't think you needed to buy the friction modifier from the dealer. Also As said above if yo have QTI you can use ATF+4 in your TC and not the NV245/247/249 fluid
The dealer today told me that I need friction modifier on QTI after looking at his computer database. ?? Maybe you probably right! They don't know anything.. It is so hard to get reliable info on a simple thing like changing the axle oil..
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  #43  
Old 11-25-2009, 12:47 AM
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Re: Axle oil change help.

fabs, i dont think you need it, but it will not hurt anything if its already in the lube or you add it.
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  #44  
Old 11-25-2009, 08:32 AM
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Re: Axle oil change help.

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Originally Posted by boniomario View Post
I have a wk but I was wondering why does it need to be serviced if it's sealed ?

I can understand the wear and tear and the heat generated in a closed system like that with minimal heat loss and pressure changes can affect the chemical composition of the oil but changing the gear oil is usually unheard of ... iJeep mentioned every 30k ...

I am merely curious as this is the first time I have heard of doing it but I am going to give it a try this weekend ...
I've never had a car in which the differential fluid was never supposed to be changed. Most of my other vehicles have had a 60-100K service interval. I'm assuming that since the diffs are such a vital part of the 4WD systems that Jeep would rather have people change their diff fluid more often than not to keep them running right. The diff fluid is supposed to be changed every 15K if you are on service schedule B.

Also, don't forget that most people don't do their own maintenance, so shorter change intervals means more trips to the dealer for maintenance.
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  #45  
Old 11-25-2009, 10:00 AM
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Re: Axle oil change help.

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Originally Posted by boniomario View Post
I have a wk but I was wondering why does it need to be serviced if it's sealed ?
Jeep differentials have a habit of going south, and are a lot of money to fix. I see a lot of people stressing over 3,000 mile oil changes, yet they ignore the differentials and transmission. Minimum interval is 30k. I do mine every 15k, cause I don't want to ever hear the dreaded "differential whine".

The rear dif is hecka easy to service, just pull the plug, pump out the old, pump in the new till it drips. 20 minutes max. You don't even have to jack up the car.

The front requires a 14mm hex wrench.

Btw for all the ELSD guys Redline makes synthetic gear oil with additive already mixed.
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  #46  
Old 11-25-2009, 10:05 AM
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Re: Axle oil change help.

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Originally Posted by scottydog View Post

Btw for all the ELSD guys Redline makes synthetic gear oil with additive already mixed.
So does Mobil 1, but I've read of people using that without the additional additive from Mopar and they got binding, so I drop 15 bucks at the dealer for two bottles of the additive and haven't had a single problem yet (and I've changed the diff fluid twice so far).
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  #47  
Old 11-25-2009, 10:05 AM
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Re: Axle oil change help.

Thank you all for the great information
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  #48  
Old 11-25-2009, 04:37 PM
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Re: Axle oil change help.

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Originally Posted by LTrainGC View Post
I am yet to find another friction modifier out there that specifically states that it has been tested and approved for use in Chrysler axles equipped with the electronic limited slip diffs. If M1 came out with something, you can bet I'd buy it. Same thing with the TC fluid - no one makes anything that has been tested and approved for use in the NV247 that QDII uses, so I buy the mopar fluid. Mopar also recommends using their 75W-140 diff fluid but I don't because it is overpriced and I feel confident that M1 make a great product - and more importantly it has been tested and meets chryslers requirement for
use. Also mopar recommends using their brand of ATF+4 in the trans but I used valvoline synthetic because it's cheaper but still has been tested and is approved for use.

I'd rather spend 15 bucks on two bottles of friction modifier from the dealer and know that I'm putting the right fluids in a vital part of the drivetrain instead of cheapng out and ruining the diff.

Me too, on something like diff additive that is hardly ever changed the $15 price is worth it IMO also. But, I just did my engine oil and used Mobile 1 synthetic and a Mobile 1 filter because it was $29.99 on sale at Advnce Auto Parts, if it was not on sale I would of used the Mobile 1 oil at $6.99 a quart but would of used a fram X-tra Gaurd filter from Walmart that cost about $7. In my previous 94 GC I used the Walmart brand of high mileage oil and the car lasted me 227,000+ miles when I traded it in. Guess what im saying is some manufacturers are just overpriced because they need to pay off all the ads and advertising they spend and another cheaper product can be used with excellent results.
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