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Old 03-16-2012, 09:22 PM   #1
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2012 ARB Differential Covers

I just installed ARB differential covers on my 2012 Rubicon. These are the Dana 44 covers. Does the factory overfill the differentials? When I pulled the fill plugs on both front and rear, quite a bit of fluid came out. I am not sure how they overfilled them. I am guessing 1/4 of a quart or so came out. I did the measurements as ARB suggested and the rear took about 1 3/4 quarts to fill and the front took 1 1/4 quarts. This seems low.
I have read people putting over 2 quarts in the rear and 1 1/2 Quarts in the front. Looking for some input or suggestions, before I drive.

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Old 03-16-2012, 10:30 PM   #2
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Project-JK.com - Jeep JK Wrangler Resource » Jeep JK Wrangler SOLID Differential Cover Installation

I trust project JK. I put almost 2 quarts in the front a couple weeks ago. No issues.

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Old 03-16-2012, 10:48 PM   #3
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Quote:
Originally Posted by River Hill View Post
I just installed ARB differential covers on my 2012 Rubicon. These are the Dana 44 covers. Does the factory overfill the differentials? When I pulled the fill plugs on both front and rear, quite a bit of fluid came out. I am not sure how they overfilled them. I am guessing 1/4 of a quart or so came out. I did the measurements as ARB suggested and the rear took about 1 3/4 quarts to fill and the front took 1 1/4 quarts. This seems low.
I have read people putting over 2 quarts in the rear and 1 1/2 Quarts in the front. Looking for some input or suggestions, before I drive.
Are you saying 1/4 quart total came out OR 1/4 more than you thought should be in there?

The fron diff uses 2.8 pints (bit less than 1.5 quarts) and the rear uses 4.7 pints (bit less than 2.5 quarts).
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Old 03-16-2012, 11:38 PM   #4
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Quote:
Originally Posted by River Hill View Post
…These are the Dana 44 covers. Does the factory overfill the differentials? When I pulled the fill plugs on both front and rear, quite a bit of fluid came out....

Yeah, the factory fills them so when you take off the fill plug oil will come out (I saw the same thing in my front and rear when I swapped out my stock covers):


Quote:
Originally Posted by River Hill View Post
…and the rear took about 1 3/4 quarts to fill and the front took 1 1/4 quarts. This seems low…I have read people putting over 2 quarts in the rear and 1 1/2 Quarts in the front. Looking for some input or suggestions, before I drive.

The FSM calls for 1.35 quarts in the front and 2.375 quarts in the rear. With my Riddler’s I put 1.375 quarts in the front and 2.5 quarts in the rear. I originally put 1.5q in the front but on a really hot summer day when I was wheeling the oil puked out the vent, so I lowered it a bit and I’ve been fine. If you overfill it you’ll just get oil puke and maybe a leaky pinion seal...
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Old 03-17-2012, 05:52 AM   #5
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Originally Posted by SilverRubi View Post
Are you saying 1/4 quart total came out OR 1/4 more than you thought should be in there?

The fron diff uses 2.8 pints (bit less than 1.5 quarts) and the rear uses 4.7 pints (bit less than 2.5 quarts).
A 1/4 quart came out when I removed the fill plug, but much more when I pulled the cover.
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