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Old 05-26-2016, 10:30 AM
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Differential & Xfer Case Fluid Change

I have 107,000 miles on my 2014 4X4 Limited JGC Turbodiesel and am planning to change the fluids in the both differentials and Xfer case this weekend. For someone that has done this I stuck a 10mm Allen Wrench in the drain and fill plugs to make sure it was the correct size and it seemed a little loose. Am I just imagining that or does it take an 8mm Allen (which I don't currently have).

Thanks in advance for your help.

---------- Post added at 09:30 AM ---------- Previous post was at 09:12 AM ----------

Sorry, I meant to ask if 10mm is the correct size or do I need like a 3/8" inch allen?

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Old 05-26-2016, 06:21 PM
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Differential & Xfer Case Fluid Change

If it was loose with a 10mm, the 8 is smaller so could be 11mm instead.

3/8's would be around 9.5mm
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Old 05-26-2016, 06:47 PM
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Re: Differential & Xfer Case Fluid Change

Lifeguard 8 for a drain and refill too for the trans....
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Old 05-27-2016, 08:47 AM
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Re: Differential & Xfer Case Fluid Change

I decided not to tackle the transmission. At this point I'm taking Jeep at their word that the ZF trans is a lifetime fill.
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Old 05-27-2016, 11:41 AM
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Re: Differential & Xfer Case Fluid Change

As background I have fairly extensive experience with ZF transmissions and ZF states that the transmission fluid should be drained and refilled every 80,000 kms or 50,000 miles. I will be changing mine in 10K miles since I am at 40K right now.

BMW also stated lifetime fill until transmissions started failing then changed their policy to every 100K miles which is half of what the transmission manufacturer recommends.

I provide this as information so that others might understand that there is no such thing as lifetime fill unless the lifetime is 100K miles which you are already at.

Lifeguard 8 is easily obtained from places like CTSC in California for around 9 bucks a L if you buy a dozen L which is what I will do since this trans will take around 5 1/2-6 to drain and refill.

Genuine ZF Parts

Please post where you get your diff and transfer case fluids. At this point I am thinking of using MOPAR products which are rebranded for them by some manufacturer...
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Old 05-27-2016, 12:11 PM
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Thanks for the info, im seeing it for $17 L on the website link. Where is it for $9? Also where is the best price on the pan filter for jeep. Now that we have a much more decent price on the fluid the pan filter is where we need to find a good cost on to get the trans fluid changes reasonable on these 8spds
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Old 05-27-2016, 01:44 PM
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Re: Differential & Xfer Case Fluid Change

I bought what the Owner's Manual recommended:

For the transfer case fluid change I bought 2 qts of Mopar ATF+4 at $12/qt off of Amazon Prime.

For the differentials I bought 3 qts of Mopar Synthetic Axle Lubricant 75w85 at $40/qt off of Amazon Prime. Each diff has a 1.2 qt. capacity.

I appreciate your thoughts and experience with the transmissions. Maybe I'll change my plans at 150k.

Thanks.
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Old 05-27-2016, 03:53 PM
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Re: Differential & Xfer Case Fluid Change

Silvermax04:
His price has gone up so you do pay around $17/ L.
Thanks for the correction.
You need around 6 L to do the job so 105.00 to do a drain and refill for LG8.
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Old 05-27-2016, 03:59 PM
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Re: Differential & Xfer Case Fluid Change

Treeguy
Thanks for the information. I do plan to buy those products as I think I will have no problem if a warranty issue comes up.

For those interested the transmissions in virtually all ZF transmissions are serviced the same way.
Drain the pan. Refill through the fill port until weeping out the fill port. Next start the engine after putting the fill plug in loosely. Run the engine until the trans fluid temperature is between 80-120F open the fill port fill until weeping again then put the plug back in place.
Once you have access to the drain and fill plugs this is about a 30 minutes procedure.
LG8 is a very slippery synthetic that will smell bad. I don't know why but all LG products stink so be forwarned.

Found this I knew I had it somewhere

Here's the response I got from ZF when I asked for confirmation about "lifetime" transmission fluid...

generally we suggest to change the oil between 80.000km and 120.00km. Attached you can find our
official list of lubricants (TE-ML11) with the necessary information about, when to change the oil and
what kind of oil you should use. The second document shows you how to change the oil. But, please
be careful, because you need any kind of tester to read out the temperature while you change the oil.
If the temperature is not correct, you could damage your transmission!
Mit freundlichen Grüßen/Kind regards
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Old 05-27-2016, 04:00 PM
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Quote:
Originally Posted by fun2drive View Post
Silvermax04:
Did you read my post where I said is you buy 12 you get that price???
I did read that but the website says 12 for $209 which works out to $17.40 each instead of $9 that's why I was confused. Maybe I'm not looking in right place or missed something somewhere?
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Old 05-27-2016, 04:36 PM
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Re: Differential & Xfer Case Fluid Change

No I was wrong corrected the quote above.
It is exactly what you posted. Not long ago he had LG6 and LG8 for like 112 and 125 a dozen but my guess is his cost went up.

Apologize for the confusion and wrong pricing.
It is still not bad since I think the dealer wanted 30 a Liter for it or close last I checked.
There is another supplier Motul but it is around the same price as LG8 so really no point in trying to find that.
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Old 05-27-2016, 04:58 PM
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Quote:
Originally Posted by fun2drive View Post
No I was wrong corrected the quote above.
It is exactly what you posted. Not long ago he had LG6 and LG8 for like 112 and 125 a dozen but my guess is his cost went up.

Apologize for the confusion and wrong pricing.
It is still not bad since I think the dealer wanted 30 a Liter for it or close last I checked.
There is another supplier Motul but it is around the same price as LG8 so really no point in trying to find that.
Yeah i agree $17 is still great price on it, when i was looking before it was like $45 from dealers. So do you think that pan kit they have on there for the bmw 8hp70 will work on our jeeps or are there different pans on 8hp70s depending on the car.
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