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  #49  
Old 11-25-2009, 04:45 PM
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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 ...

The oil needs to be changed because it breaks down over time with all the stress its under from the gears. Plus its good to remove any small pieces of metal that may deposit in the oils. Picture how fast those gears are going back there at highway speeds, pressing against eachother with just a tiny film of oil to lube them. Im not a scientist and know exactly how and why it breaks down, I just know it does and needs to be changed at specific intervals. Plus its a good practice to always check the fluid levels, never know if a gasket or seal has failed and the part is leaking fluid slowly, only to realize one day when the diff locks up on the highway because of having no more oil in it.
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  #50  
Old 11-25-2009, 08:57 PM
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Re: Axle oil change help.

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Originally Posted by LTrainGC View Post
Also As said above if yo have QTI you can use ATF+4 in your TC and not the NV245/247/249 fluid
The QT1 (NV-147) requires the Mopar t-case fluid, the Selec-Trac (NV242) is the only t-case that specs ATF+4.
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  #51  
Old 11-25-2009, 10:14 PM
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Re: Axle oil change help.

True.
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  #52  
Old 11-27-2009, 10:58 AM
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Re: Axle oil change help.

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Originally Posted by LTrainGC View Post
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).
Just be careful not to use too much, as the elds can start to slip. I've heard of guys that keep adding additive little by little until the noise stops.
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Old 12-28-2010, 10:06 PM
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Re: Axle oil change help.

Agree with Timmy B above. I have a 2005 WK Limited with 5.7 Hemi and QD-II. QD-II has C200FE axle in front and C213RE axle in the rear as well as the NV-245 tranfer case. I do quite a bit of commuting with my Jeep and have changed the axle fluids several times. Here is my experience.

Axles: The 200FE and 213RE are electronic limited slip differentials. These axles both require 75W-140 Synthetic Fluid with a rating equivalent to API-GL5. In addition, both axles require 4oz/per axle of Mopar Limited Slip Additive. The 200FE takes 57.5oz of fluid (53.5oz of 75W-140 and 4oz of Limited Slip Additive). The 213RE takes 75.5oz of fluid (71.5oz of 75W-140 and 4oz of Limited Slip Additive). I have used the Mobil 1 LS and have been very happy. I am going to switch to Royal Purple Max Gear 75W-140 in the next change as I saw some wear pictures from components that used RP and the components had a mirror surface and improved gas milage. Since I do quite a bit of commuting, I want to see if this will make a difference. Make sure to use Limited Slip Additive. The Mobil 1 LS bottle says it has friction modifier, however, I experienced the binding noise. As soon as I added the Limited Slip Additive, that binding and noise went away. The RP says the same, but I am going to add the additive anyway to ensure. I initially used a generic brand of Limited Slip Additive from Pep Boys and got the binding noise in the cold weather, so I switched to the Mopar fluid and did not have an issue. I think it is worth paying the premium for the Mopar Limited Slip Additive after having done this three times and going onto my forth change.

Transfer Case: QD-II uses the NV-245 transfer case. The NV-245 calls for Mopar NV245/247/249 Fluid. I have yet to find an equivalent. I spoke to the Royal Purple folks today and they did not recommend using either of their automatic or manual transmission fluids for the NV-245. They did say that they have an industrial product called SynTractor III that would be the equivalent. The problem is that SynTractor III is only sold in 5 gallon containers and you only need 2 quarts for a transfer case change. The Royal Purple Tech Support recommended sticking with the Mopar fluid unless you could find someone selling quarts from a 5 gallon container.

Point of note: There are two transmissions I am aware of that were used between all of the 05-10 WKs. The W5A580 was used with the 3.7L and 6.1L engines. The 545RFE was used in the 4.7L and 5.7L engines. Both of these automatic transmissions use ATF+4. There are several aftermarket manufacturers that make ATF+4 including Castrol and Royal Purple. In addition, the NV-140 transfer case that comes with the Quadra-Trac I 4WD system uses ATF+4 as opposed to the Mopar specific fluid used in the NV-245 Transfer Case used in the Quadra Trac-II and Quadra Drive II.

Is anyone aware if:

1. There is an aftermarket company that makes gaskets for the front and rear differential covers (C200FE and C213FE) as opposed to the RTV?

2. There is an aftermarket compnay that makes a replacement differential cover for the rear axle (C213FE) that has a drain plug and fill plug as opposed to just the fill plug?

3. There is an aftermarket company that makes a gasket for the transmission (545RFE) oil pan?

4. There is an aftermarket compnay that makes an oil pan with a drain plug for the 545RFE transmission?
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  #54  
Old 12-28-2010, 10:41 PM
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Re: Axle oil change help.

this thread is over a year old lol
http://www.quadratec.com/products/52416_105.htm
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Old 01-01-2011, 12:53 PM
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Re: Axle oil change help.

I have an 08 WK 4.7 QTII. I tried the lubelocker on my old XJ and they didn't work well for me on reuse (I think that was the advantage of the lubelocker). The idea sounds great but I went back to standard gaskets. I was also looking for a rear diff cover with drain plug but couldn't find one.

For the WK QTII transfer case.. I checked via email to Amsoil and they do have something they recommend and it is available in quart bottles. I've already done the front diff with 75w-140w severe gear and will be doing the rear with the transfer case this week. I wasn't planning on adding any additive to the rear diff but interested in checking before/after for this binding noise. What's the best way to check for it, what am I listening for?
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Old 01-03-2011, 11:16 PM
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Re: Axle oil change help.

Checked out Lubelocker but they didn't have a gasket for either the transmission oil pan or the rear axle diff cover. I have seen some gaskets on generic parts websites, but not sure how they might work vs. the RTV.

In cold weather, it sounded like the driveline was straining. Could tell it wasn't the engine because it was not making the noise at idle. Was worried it was the trans, but had just done the axles so I figured I would start there. When I redid them, the sound went away.
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