2007 Sportage 4WD - Rear differential and transfer case fluid change frequency - Kia Forum
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#1 (permalink) Old 06-02-2010, 10:25 PM
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Default 2007 Sportage 4WD - Rear differential and transfer case fluid change frequency

Hi everyone. New member here, but have enjoyed the information here for a long time. I own a 2007 4WD 2.7 V6 LX with about 48,000 miles. I was wondering how often any of you have changed the transfer case and rear differential fluid?

I read the owner's manual and for the rear differential it simply says to inspect every 25,000 miles and change if needed. For the transfer case, it says to inspect at 25,000 and definitely change at 60,000.

Seems straightforward, except that I have my vehicle serviced at 2 Kia dealerships (depending on which one I'm closer to on any given day). One says that I should replace both at 50,000 miles. The other claims that it has NEVER done either service on a 2G Sportage because their mechanics have never found it to be necessary. They said they wouldn't recommend either until 100,000 miles. I have had good experiences with both dealerships and trust them both for the most part.

Any advice from anyone out there? It would be appreciated.
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#2 (permalink) Old 06-03-2010, 01:22 AM
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Hi, I changed them myself at 40,000 miles as the car is a "keeper". Both fluids were quite dark so was well worth a change for the little cost involved and I will now change every 4 years. The same goes for the autobox as well.
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#3 (permalink) Old 06-04-2010, 10:25 AM
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I changed my out and switched to a full synthetic at <5k.
As of 30k miles now, I have 2 changes on the xfer case and 'end.

2 quarts of gear oil and a couple dealer sourced washers won't break the budget.

The factory fill fluid looked horrible and magnet was covered with wear, most likely from the break-in. The Mobil1 didn't show any wear on the magnets after being in service for 5x as long. My vehicle is a keeper so ALL gear oils will get the 30k change interval.

The severe service interval should be looked at. Its in your owner manual!
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#4 (permalink) Old 06-06-2010, 09:48 AM
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I'd like to change my sportage's transfer box and differential fluid too. Does anyone have the step by step or point out the manual regarding to change the fluid? Thanks.
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#5 (permalink) Old 06-08-2010, 02:26 PM
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When you do change it makes very good sense to go with synthetic fluid.
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#6 (permalink) Old 06-08-2010, 09:57 PM
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I try to change them both out every 15K. The T-case is usually pretty clean, and could probably be stretched to 30K. The read diff is usually pretty dark. Look at the "severe duty" schedule in the maintenance section of the owners manual. I think that's the safest way to go. Fluids are cheap insurance.

To change the fluid in the T-case, I use: 15/16 box end wrench (drain plug), 10mm hex bit (fill plug). Get a hex bit with a 3/8 drive on it, the fill plug is usually tight as hell the first time you break it free.

To change the fluid in the rear diff, i use: 15/16 box end wrench (fill plug), 24mm socket (drain plug). For both T-case and rear diff, just drain, and refill until to fluid is level with the bottom of the fill plug holes. Both combined should only be about 1.4-1.6 quarts of fluid.
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#7 (permalink) Old 06-10-2010, 11:25 PM
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Thanks for the advice folks, although much of it doesn't apply to me since it seems that many (all) of you are DIYers. I guess I should have clarified that I have my maintenance done at dealerships and there is no way in h&^$ I'm doing this on my own. My question related more to how often I should have this done by someone else.
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#8 (permalink) Old 06-11-2010, 12:02 PM
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Quote:
Originally Posted by mattybyzf View Post
I try to change them both out every 15K. The T-case is usually pretty clean, and could probably be stretched to 30K. The read diff is usually pretty dark. Look at the "severe duty" schedule in the maintenance section of the owners manual. I think that's the safest way to go. Fluids are cheap insurance.

To change the fluid in the T-case, I use: 15/16 box end wrench (drain plug), 10mm hex bit (fill plug). Get a hex bit with a 3/8 drive on it, the fill plug is usually tight as hell the first time you break it free.

To change the fluid in the rear diff, i use: 15/16 box end wrench (fill plug), 24mm socket (drain plug). For both T-case and rear diff, just drain, and refill until to fluid is level with the bottom of the fill plug holes. Both combined should only be about 1.4-1.6 quarts of fluid.
Thanks for your detail information, what brand and grade of fluid that you would recommend?
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