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  #13  
Old 05-13-2016, 07:25 PM
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Re: Diff oil replacement

Thanks for the post about diff oil changes.

I'll be doing my diffs myself, nice and early. I'm thinking around 30k.

I'll also pay a ZF specialist to do a transmission fluid change at perhaps around 50k- we do a lot of towing, I gather that's an $750 or so job including a new transmission pan and filter.

Stupid question though, how do I know if I have an ELSD. It's an MY14 3.0 litre Laredo diesel, which does seem to have an LSD though.
When I jack both sides, I can't spin a rear wheel with the park brake off, which seems like LSD behaviour.


Thanks in advance!

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  #14  
Old 05-15-2016, 06:42 PM
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Re: Diff oil replacement

Quote:
Originally Posted by Futuresystem View Post
Thanks for the post about diff oil changes.

I'll be doing my diffs myself, nice and early. I'm thinking around 30k.

I'll also pay a ZF specialist to do a transmission fluid change at perhaps around 50k- we do a lot of towing, I gather that's an $750 or so job including a new transmission pan and filter.

Stupid question though, how do I know if I have an ELSD. It's an MY14 3.0 litre Laredo diesel, which does seem to have an LSD though.
When I jack both sides, I can't spin a rear wheel with the park brake off, which seems like LSD behaviour.


Thanks in advance!
G Day David
If your vehicle came with the Off Road Adventure Pack then it came with the Electronic LSD - Part of the Quadradrive II system.
If its bog standard then it came with Quadradrive II and the normal diff - (thats ours….).
I would expect that as the ELSD is electronic then it would have some sort of electrical connection on the diff exterior to supply power to the diff clutch pack, so it is possible it can be identified by just looking.

Bob T who posted a bit earlier has the ELSD, so he will be along in a minute and confirm.
From his post he used the same friction modified oil in both his diffs - won't hurt, just a bit more expensive.

Getting the ZF gearbox oil changed is likely a good preventative measure, probably could go a bit more than 50K but i guess it depends on how hard you are working it and how much peace of mind is worth to you.
Think you might be a bit optimistic on the price though, the change involves a new pan with an integrated filter - there's a bit of information starting to float around about whats involved.

John
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  #15  
Old 05-15-2016, 07:11 PM
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Re: Diff oil replacement

Quote:
Originally Posted by John47 View Post
G Day David
If your vehicle came with the Off Road Adventure Pack then it came with the Electronic LSD - Part of the Quadradrive II system.
If its bog standard then it came with Quadradrive II and the normal diff - (thats ours….).
I would expect that as the ELSD is electronic then it would have some sort of electrical connection on the diff exterior to supply power to the diff clutch pack, so it is possible it can be identified by just looking.

Bob T who posted a bit earlier has the ELSD, so he will be along in a minute and confirm.
From his post he used the same friction modified oil in both his diffs - won't hurt, just a bit more expensive.

Getting the ZF gearbox oil changed is likely a good preventative measure, probably could go a bit more than 50K but i guess it depends on how hard you are working it and how much peace of mind is worth to you.
Think you might be a bit optimistic on the price though, the change involves a new pan with an integrated filter - there's a bit of information starting to float around about whats involved.

John
Thanks John,
Much appreciated.
I'm amazed the diffs hold so little oil. Around 1 litre certainly isn't much, the oil must be working pretty hard.
It's certainly a job I will do sooner rather than later.

As for the transmission, "sealed for life" is rubbish in my opinion.
Sealed for the life of the transmission means when the transmission dies, that's it's life.

A complete fluid change, particularly the first one with all the metal from new, simply has to be good insurance. Sure there is a filter, but it has limitations.

I have never drained the oil on ANY transmission, manual or auto, from new, without finding a heck of a lot of metal. It's inevitable with the running in process.

So 50k is my aim, maybe I'll consider going slightly further, but not much, time will tell.

Cheers and thanks,
David
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  #16  
Old 05-15-2016, 11:50 PM
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Re: Diff oil replacement

Quote:
Originally Posted by John47 View Post
G Day David
If your vehicle came with the Off Road Adventure Pack then it came with the Electronic LSD - Part of the Quadradrive II system.
If its bog standard then it came with Quadradrive II and the normal diff - (thats ours….).
I would expect that as the ELSD is electronic then it would have some sort of electrical connection on the diff exterior to supply power to the diff clutch pack, so it is possible it can be identified by just looking.

Bob T who posted a bit earlier has the ELSD, so he will be along in a minute and confirm.
From his post he used the same friction modified oil in both his diffs - won't hurt, just a bit more expensive.

Getting the ZF gearbox oil changed is likely a good preventative measure, probably could go a bit more than 50K but i guess it depends on how hard you are working it and how much peace of mind is worth to you.
Think you might be a bit optimistic on the price though, the change involves a new pan with an integrated filter - there's a bit of information starting to float around about whats involved.

John
As predicted, here I am. See Jeep Grand Cherokee WK2 - Maintenance information and schedules . This shows outlines of the various rear diffs. The ELSD one has that cylindrical thingy sticking out the side. If you look at the driff from in front of the left rear wheel, you should be able to see it. It's black. I presume it's an electrical actuator of some sort, a solenoid or perhaps a motor.

Confusingly, for us at least, Americans call diffs, axles. So when they refer to a 230mm axle, they don't mean your rear axle shaft is about a foot in diameter but that the crown wheel in the diff is 230mm in diameter.

Regarding diff oils, someone else on this thread wisely pointed out that it is cheaper to buy 3 quarts (3L) of the dearer LS diff oil to do both front and rear diffs than to buy 2 quarts (2L) for the rear and another 2 quarts of standard diff oil for the front.

I don't know about the ZF box but I had a fill for life box in a Commodore SV6. It's not that it didn't need oil changes, it simply couldn't be changed. These days, technology is so good and maintenance so bad that the life of many components can be significantly prolonged by avoiding maintenance altogether. I've seen industry data that clearly shows most failures occur immediately after routine maintenance events. So it is says your box doesn't need oil changing, leave well enough alone unless you intend to keep the car until it becomes a collectors' item.
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  #17  
Old 05-17-2016, 01:11 AM
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Diff oil replacement

Quote:
Originally Posted by Futuresystem View Post



As for the transmission, "sealed for life" is rubbish in my opinion.

Sealed for the life of the transmission means when the transmission dies, that's it's life.:

Agreed. Whenever you see the term "Sealed for Life" on a motor vehicle, read it as "Sealed for the Life of the warranty", after which, they don't care. If you want to keep the vehicle long term, the trans fluid will need changing. If you are like many people who change their vehicles around 100k, then don't bother.


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  #18  
Old 05-22-2016, 03:45 AM
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Re: Diff oil replacement

Hi about to do the front and rear diffs, I dont have a ELSD, is this the correct product?

Mobil Oil, Redline Oil, Shell Oil, Royal Purple Oil, Pennzoil Oil,Dust-Off, Plasti Dip!

not this

Mobil Oil, Redline Oil, Shell Oil, Royal Purple Oil, Pennzoil Oil,Dust-Off, Plasti Dip!

thanks
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  #19  
Old 05-22-2016, 09:53 PM
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Re: Diff oil replacement

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Originally Posted by zzkazu View Post
Since you don't have an ELSD, either should be OK. However, I baulked at the mention of extreme pressure additives. If you don't have your diffs constantly under extreme loads, the EP additives can build up layers causing problems down the road. It is not uncommon for wheel bearings to explode where people have used EP greases in lightly loaded wheel bearings. Perhaps I'm being overly cautious.
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Old 05-23-2016, 04:10 AM
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Re: Diff oil replacement

I use Penrite Pro-gear 75w-90 in mine, front and rear. GL5, great product.


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  #21  
Old 05-25-2016, 03:33 AM
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Re: Diff oil replacement

Ok thanks for the info.

Swampy I assume you don't have an ELSD?

I intend using something like this in both Diffs and Mopar ATF+4 in Transfer case.
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  #22  
Old 05-25-2016, 04:39 AM
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Re: Diff oil replacement

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Originally Posted by zzkazu View Post
Ok thanks for the info.

Swampy I assume you don't have an ELSD?

I intend using something like this in both Diffs and Mopar ATF+4 in Transfer case.

Yes, I do have ELSD (Quadra Drive). I use the Pro-gear (GL5) in both the front and the rear diffs and Penrite ATF FS for the transfer case.


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  #23  
Old 05-25-2016, 04:55 AM
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Re: Diff oil replacement

Ok, do you know if it would be ok in an non ELSD diff?
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  #24  
Old 05-26-2016, 03:32 AM
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Re: Diff oil replacement

Absolutely.


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