Changing the Transfer Case Fluid (Pics) - Diesel Truck Forum -
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post #1 of 3 (permalink) Old 06-12-2009, 11:37 PM Thread Starter
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Changing the Transfer Case Fluid (Pics)

It's actually quite easy!

First find the back of your transfer case. It should look like this ~

As you can see there are two 'plugs'. You will need a 10mm hex wrench. (I donít know if there is a technical name for these.)
Loosen the lower plug (bottom left) and have a drain pan ready because when it comes out ... it comes out!

Once you have let it drain, reinstall the lower plug (bottom left). Then remove the upper plug (upper right) - this is where you add the new fluid.
I used Mobil 1 ATF but you can use whatever brand you prefer. You will see that unless you have some kind of cool funnel adding the fluid is a pita.
As I had no cool funnel I used an old differential fluid jug left over from another project.
I used some cheap tranny fluid to 'rinse' any remnants of the differential fluid out of the jug.
I then added the Mobil 1 to the differential fluid jug and squirted 2 quarts back into the transfer case.

Took me about 30 mins which included walking back and forth to the shed and letting the old fluid drip out for a bit.
These are the tools I used - 3/8 drive ratchet, 10mm hex end, some ATF and some way to get it in there.

Good Luck!

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post #2 of 3 (permalink) Old 06-15-2009, 10:27 PM
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You always do great write ups billsfan. Thanks for sharing!


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post #3 of 3 (permalink) Old 08-13-2009, 08:50 PM
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Thanks there big guy. I do a lot of plowing in both my "99 & '06.

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