Gear oil change - : Jeep Wrangler JK Forum
LinkBack Thread Tools Display Modes
post #1 of 5 Old 02-24-2014, 07:38 PM Thread Starter
Rock God
Join Date: Aug 2012
Location: Myrtle Beach, SC
Age: 47
Posts: 1,258
Feedback: 6 reviews
Gear oil change

Changed the gear oil today and replenished with Mobil 1 75w90. Made it a point before draining to position the jeep so the would run out downhill. And to fill positioned the Jeep so I could maximize what I could put back in. So I have read the rear 2.375 or whatever quarts and 1.35 quarts in the front. Well my issue is I am about 12oz short in both front and rear. For the back I jacked up the rear end as high as I could even added a 6x6 for extra height. Is it common to not be able to get the full amount in? Is it imperative that I tr to get the last little bit in? I got 2 quarts in Rear and 1 in the front. What do the experts advise ?
da20captain is offline  
Sponsored Links
post #2 of 5 Old 02-24-2014, 07:45 PM
JKO Addict!
jason mac's Avatar
Join Date: Oct 2010
Location: Earth
Age: 49
Posts: 3,408
Feedback: 6 reviews

Those specs are what I get in mine. I run non synthetic oil. Had issues in a few front axles with leaking oil out the tubes. Since switching to reg dino oil, no leaks at all.
jason mac is offline  
post #3 of 5 Old 02-24-2014, 07:51 PM
Rock God
10jk's Avatar
Join Date: Apr 2011
Location: On the shitter with my Mega Blocks
Posts: 580
Feedback: 0 reviews

Check it for foaming/brown chocolate milk looking after water runs. Use the cheap stuff at walmart, especially if ya change it often.

2010 JKUR, 4" Pro C., 3/4" f Daystar spacer, 5.38's, EVO sleeve/gusset/custom trussed, Rear Ten Factory axle shafts, 1.5" wheel spacers, Pro C. 17 x 9 wheels, 38 x 14.50 x 17 MTR's, SuperChip FP, no fenders, B&M Tranny cooler, Magnaflow, Fr./ Rr. frame hacked off, HD Balls

29,000 miles as of 12/13/14
10jk is offline  
Sponsored Links
post #4 of 5 Old 02-24-2014, 08:44 PM
Rock God
Rubiconquered's Avatar
Join Date: Jan 2012
Location: Chandler, AZ
Age: 31
Posts: 1,218
Feedback: 0 reviews

That's the same that I got when I changed my gear oil a few weeks ago.

One quart up front 2 in the rear. I drove it for a few days and re checked and is still full front and rear. Same thing full synthetic but I used valvoline.

Sent from inside the Death Star

Rubiconquered is offline  
post #5 of 5 Old 02-24-2014, 09:27 PM
Rock God
ronjenx's Avatar
Join Date: Aug 2010
Location: Maine
Posts: 1,883
Feedback: 0 reviews

Here are the factory differential capacities for the JK:

FRONT AXLE .03 L (1 oz.)
186 FBI (Model 30) 1.0 L (1.05 qts)
216 FBI (Model 44) 1.3 L (1.35 qts)

REAR AXLE .03 L (1 oz.)
198 RBI (Model 35) 1.83 L (1.9 qts)
226 RBI (Model 44) 2.25 L (2.4 qts)

Actual amounts from factory on my vehicle:
Front Dana 44: 44oz (15oz above bottom of fill hole) (1.4 qts)
Rear Dana 44: 72oz (slightly above bottom of fill hole) (2.25 qts)

When I service mine, I fill it to the level it was from the factory.
It wasn't leaking, foaming, or blowing out the vent, and it isn't doing so now.
I figure the extra fluid is keeping the seals wet, maybe preventing leakage.

2008 Unlimited Rubicon Automatic
ronjenx is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the : Jeep Wrangler JK Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome