Diff Fluid Change - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 10 Old 01-23-2012, 06:37 PM Thread Starter
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Diff Fluid Change

I have a 2010 JKU Sport with a Dana 30 in the front and 44 in the rear. I also have 80,000 miles on the Jeep. I want to do the diff fluid myself this time. I have been changing them about every 10,000 miles..How hard is it to do and what brand fluid and weight do ya'll recommend? Also I think the rear needs limited slip additivie.
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post #2 of 10 Old 01-23-2012, 07:39 PM
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Look at your manual it'll have the info on what weight to run, think its 75-90. If you have a trak lock in the rear then yes you'll need to pick up the additive from your dealer.
As far as brands go that depends on who you talk to. My personal experience with royal purple is that it doesn't last to long in the JK, I know others that have said the same thing.
I personally run the house brand from my local O'reillys.
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post #3 of 10 Old 01-23-2012, 07:44 PM
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Mobil 1 Synthetic 75w90 LS is what I run in my diffs.
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post #4 of 10 Old 01-23-2012, 07:51 PM
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4 quarts 75w90

If you use Mobil 1 Synthetic, Royal Purple, etc. you don't need the additive.

Put a catch pan under the diff; remove the plug bolt from the fill hole (a 3/8" ratchet w/o socket will remove the plug bolts); remove the bottom plug bolt and let drain.

Replace the bottom plug bolt and fill the diff; replace the top plug bolt.

Front Differential Capacity: 2.7 pints (1.35 quarts)

Rear Differential Capacity: 4.75 pints (2.375 quarts)

Easy job.

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post #5 of 10 Old 01-23-2012, 07:52 PM
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I stick with good old Valvoline conventional gear oil. It comes with the limited slip modifier already in it if you have a LS rear end. If not no worries can use the same stuff.

There is a drain plug and a fill plug. No need to pull the covers unless you want to inspect the gears.

75W90

Front Differential Capacity:
2.7 pints (1.35 quarts)

Rear Differential Capacity:
4.75 pints (2.375 quarts)
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post #6 of 10 Old 01-23-2012, 08:24 PM Thread Starter
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Thanks. I got a new project to try this weekend. And correct me if I am wrong but you fill it up thrill is spills out top plug hole


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post #7 of 10 Old 01-23-2012, 08:31 PM
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Quote:
Originally Posted by cru9 View Post
Thanks. I got a new project to try this weekend. And correct me if I am wrong but you fill it up thrill is spills out top plug hole
Yes if you have stock covers. But don't try to "keep more in it" by tossing the fill plug in it. It'll likely puke it out of the breather on your first highway run.

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post #8 of 10 Old 01-23-2012, 08:33 PM
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Quote:
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Thanks. I got a new project to try this weekend. And correct me if I am wrong but you fill it up thrill is spills out top plug hole
No you're thinking of your wife,gf and/or booty call



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post #9 of 10 Old 01-23-2012, 08:39 PM Thread Starter
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Lol!!!!!!:thumbup:


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post #10 of 10 Old 01-24-2012, 02:52 PM
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Thanks. I got a new project to try this weekend. And correct me if I am wrong but you fill it up thrill is spills out top plug hole
Correct and on the rear I usually jack up the passenger side so you can add a little bit more, It allows some fluid to run down the axle tube. Ive never had any fluid puke out of my breather tube.
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