Rubicon rear diff fluid capacity with ARB covers

[NJRadioGuy]

What is the capacity of the rear differential with the ARB cover installed (factory Dana 44/M220)? Per the shop's advice, I'm using Lucas non-synthetic 85W140 gear oil.

I have ARB diff covers on the front and rear of my 2022 JL Rubicon that were installed by a shop. Shortly after getting this done I regeared the Jeep and have just completed my 500 mile break-in period. When I removed the dipstick at the top of the cover (and cleaned/re-inserted it all the way), I noticed the fluid level was well below the line scribed onto the dipstick. I thoroughly drained the fluid through the lower drain hole and it was only about 1.2 quarts in there. When I put new fluid in I used about 1.4 litres—a bit under the half the second bottle essentially; I wasn't scientific about it. Is that sufficient? I'm using Revolution 4.88 gears.

Please and thank you.

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[autotragic]

What is the capacity of the rear differential with the ARB cover installed (factory Dana 44/M220)? Per the shop's advice, I'm using Lucas non-synthetic 85W140 gear oil.

I have ARB diff covers on the front and rear of my 2022 JL Rubicon that were installed by a shop. Shortly after getting this done I regeared the Jeep and have just completed my 500 mile break-in period. When I removed the dipstick at the top of the cover (and cleaned/re-inserted it all the way), I noticed the fluid level was well below the line scribed onto the dipstick. I thoroughly drained the fluid through the lower drain hole and it was only about 1.2 quarts in there. When I put new fluid in I used about 1.4 litres—a bit under the half the second bottle essentially; I wasn't scientific about it. Is that sufficient? I'm using Revolution 4.88 gears.

Please and thank you.

The same as it was before.

-diff fill-
Front: 1.31qt-1.24L
Rear: 1.83qt-1.74L

This is for the Rubicon D44s.

You're supposed to scribe the dipstick at the same level as the fill hole on the stock cover. I think it's just over an inch from the end of the stick. Basically take the stock cover, line it up side by side with the ARB and using a straight edge laid across both then mark the dipstick to the same level. Now if the shop that did the install actually did it right or not is another matter.

 

[NJRadioGuy]

This was the rear, and there's no way there was 1.74 litres in there when I drained it. It was just a bit more than a quart. I didn't install the diff new cover, but the tech who did said he was careful to mark it. The mark he made on it was bout an inch and a half above the magnet at the bottom of the dipstick.

 

[autotragic]

This was the rear, and there's no way there was 1.74 litres in there when I drained it. It was just a bit more than a quart. I didn't install the diff new cover, but the tech who did said he was careful to mark it. The mark he made on it was bout an inch and a half above the magnet at the bottom of the dipstick.

An inch and a half is a little much but not crazy. If you're getting to the end of your second bottle then you've definitely got enough in there.

 

[dpike]

I marked my rear about 3/4" up from the magnet when I had those covers. You can see the stick in some of the photos.

https://www.jlwranglerforums.com/forum/threads/arb-diff-covers-for-m210-m220.122551/post-2557246

Sounds like GlodeX did your regear.

 

[NJRadioGuy]

Sounds like GlodeX did your regear.

How'd you know?

 

[dpike]

How'd you know?

They did my regear too and pushed the Lucas. I used bagged oil for my last change.

 

[Mudyapster]

I have ARB Covers and my mark is about 1" above the magnet also. I use Amsoil Signature series oil in both front and rear diff. I'm re-geared to 4.56 with Revolution Gears.

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