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Unread 08-11-2015, 01:20 PM   #1
mx71
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Differential Fluid Change

I've been searching here and everywhere and the more I search, the less sure I am.

Are people changing the diff. fluid at 36,000, or is that more of a check interval over a change interval?

Also, I'm pretty sure I don't but how do I know if I have ELSD? MY codes are DR1P for the rear axle and DS8S for the differential. I don't see anything on my build sheet about a ELSD.

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Unread 08-11-2015, 01:36 PM   #2
ColdCase
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ELSD only comes with quadra-drive, does your EVIC display Quadra-Drive when you push the start button? Does the rear diff have an electric motor hanging off it similar to the one hanging off the transfer case? You should see AWBP and DSFP on the build sheet for ELSD.

The 36,000 mile fluid change is for severe use. If you routinely take the Jeep off road through mud and water or tow heavy a lot, then change it, otherwise just check the level.
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Unread 08-11-2015, 01:57 PM   #3
Turbozcs2003
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Change it you will be amazed at the amount of debris floating in the fluid. Gear oil is cheap and it is 10 minute job to change it, just buy a outboard fluid pump with threads onto a qt bottle.
Dont forget your t-case too. I wouldnt want to leave all the metal floating around in my diffs for 36K miles, no thanks!
jeep-gearoil-1100miles2ndchange.jpg

jeeptcase1600miles2ndchange.jpg

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Unread 08-11-2015, 02:35 PM   #4
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I have the QT2, so I guess no ELSD. Will any GL-5 75w-85 work? If so, those pictures are pushing me to just doing it for piece of mind.
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Unread 08-11-2015, 02:55 PM   #5
Turbozcs2003
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I used redline GL5 75w-90, technically the jeep comes with the 75w-85. The redline has the additive for the diffs in it.

Lots of pearl in those and that was the second change and my jeep only had about 1600 miles on it and the batch of gear oil only a 1000. Diffs shed a lot of metal breaking in. I will probably go another 5K or so and change it next spring and see what it looks like.

If your at 36K, I would change it with a good synthetic and your probably good to go for a while.
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Unread 08-19-2015, 11:44 AM   #6
mx71
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Anybody else? The dealer is stating it should be changed every 25-30,000, however my manual shows that as the taxi service interval.

They also are recommending a tranny flush at 30,000. That can't be right, can it?
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Unread 08-19-2015, 01:53 PM   #7
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Quote:
Originally Posted by mx71 View Post
They also are recommending a tranny flush at 30,000. That can't be right, can it?
What does your owner's manual say about trans fluid change interval?

I had my front and rear diffs and the transfer case fluid changed at the dealership at about 30k miles.
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Unread 08-24-2015, 11:57 AM   #8
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I just went ahead and did it. I'm glad I did, the fluid that came out of the rear was pretty dark. I ended up getting the mopar fluid from ebay for what worked out to about $20/qt shipped.
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Unread 08-24-2015, 11:15 PM   #9
ssgunner
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You did it your self or had the dealer do it? I'm sure the charge an arm and a leg.
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Unread 08-25-2015, 10:50 AM   #10
mx71
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I did it myself.
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