Help with rear diff.

Adrenaman · **Posted:** Sun Mar 05, 2006 10:42 am

Hi im new to the jeep world. I just bought an 2002 liberty limited 4x4. I want to change the front and rear diff fluids. My liberty has select trac. Can I use mobil 1 75/90 gear oil? Or what kind should I use? Also do I need to put a bottle of friction modifier in the rear? I dont know if I have a Track Lok rear differential.

Thanks.

JJsTJ · **Posted:** Sun Mar 05, 2006 12:22 pm

Front uses API 75/140 synthetic GL5 gear oil, 1.25 L.

Rear uses API 75W90 gear oil, or 75/140 synthetic GL5 for towing/hard use, 2.1 L.

Use friction additive in the rear IF you have trac-lock, see axle tube for sticker stating if you have it or I believe you can request the info from a dealer of through Jeep.com via your VIN.

If you can wait a little while, you can buy Amsoil Lubrication products through this site.

Eddo · **Joined:** Thu Jul 07, 2005 7:01 pm **Posts:** 1214

JJ is correct. In addition, the transfer case does not use gear oil. It uses ATF preferable AFT4. All the information you need should be in the owners manual in case you want to double check or forget.

Adrenaman · **Posted:** Sun Mar 05, 2006 2:50 pm

What will it say on the sticker if I have it?

KJ04 · **Posted:** Sun Mar 05, 2006 2:57 pm

Waldn · **Posted:** Sun Mar 05, 2006 3:05 pm

Adrenaman wrote:

What will it say on the sticker if I have it?

mine has a green tag wrapped around axle tube on the right side that says Trac-Lok

Jeepjeepster · **Posted:** Sun Mar 05, 2006 3:23 pm

Mines green and says open.

Adrenaman · **Posted:** Sun Mar 05, 2006 3:28 pm

Mine is green and says KJ 8.25 open case. Im guessing it doesnt have Trac-Loc? Its a select trac. Should I add the friction modifier?

Waldn · **Posted:** Sun Mar 05, 2006 3:36 pm

friction modifier not needed with open differential.

JJsTJ · **Posted:** Sun Mar 05, 2006 4:42 pm

Waldn wrote:

friction modifier not needed with open differential.

or in the Transfer case.

Adrenaman · **Posted:** Sun Mar 05, 2006 5:12 pm

Thanks for the help guys. I just finished changing the fluids.

hillcountrykj · **Posted:** Sun Mar 05, 2006 6:10 pm

If you bought the Liberty new it should have it on the window sticker too. Mine said LSD on it.

Jeepjeepster · **Posted:** Sun Mar 05, 2006 6:36 pm

Adrenaman wrote:

Thanks for the help guys. I just finished changing the fluids.

Wow, you got it done in around 2 hours! Good job.

Adrenaman · **Posted:** Sun Mar 05, 2006 6:54 pm

It took me a little over an hour. Im really enjoying my KJ. Ive added a Yakima MegaWarrior and a MOPAR hitch so far. I changed the oil, plugs, filter and flushed the coolant as well. Im moving to Northern California in a couple of weeks from North Carolina. I will be pulling a small trailer with my Harley on it so I wanted to make sure the KJ is in good shape for the 3000 mile trip. Any other things I should do to prepare the KJ for the trip? Ill post some pics of my KJ tomorrow. This is a really great site you guys have here.

JJsTJ · **Posted:** Sun Mar 05, 2006 8:54 pm

Jack it up and check the ball joints. Make darn sure they are Ok before that long drive.
Then when you get to Nor-Cal, check out the L.O.S.T. KJ Norcal Group.

Adrenaman · **Posted:** Sun Mar 05, 2006 9:56 pm

Well I just checked the front wheels and they dont have any play. It was pretty hairy tho. My floor jack is broken so I had to use the stock KJ jack and its dark outside :shock:

Ill get a new jack tomorrow and check all them again.

CaKJFreedom · **Posted:** Mon Mar 06, 2006 7:50 pm

Welcome to the west coast(later)! We have a tentative Hollister run on April 10th, if you're here yet you should try and make it.

Help with rear diff.

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