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Maintenance
Oil Change
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Transfer Case/4x4 System
Part Numbers

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Transfer Case Fluid Change

Thanks to Jim Penny for this one. I don't have a 4x4 so I was a little worried how I was going to do this one :)

Stuff you'll need:

• 2 quarts of your favorite ATF
• drain pan for the old fluid
• Some towels for cleaning up
• 10 mm allen socket
• a smallish funnel
  

Find the transfer case. The drain and fill plugs are towards the rear. The
drain plug is the lower plug. The fill plug is the upper plug.

Put the drain pan under the transfer case about where you think the fluid is
going to go when it arcs through the air. The 15-quart pan that I use for
the oil works well here, and I rarely loose any ATF.

Use the 10 mm allen socket to loosen and remove the lower, or drain, plug.
You can do the last few turns by hand.

Move the drain pan to where the ATF actually arcs. Then use one of the
towels to wipe off your hands.

In a few minutes, the flow is about finished, though it will trickle out the
last spoonfull over the next three hours. When you've had enough, replace
the drain plug.

Remove the upper, or fill, plug.

Add two quarts of ATF using the funnel. There exist small pumps at NAPA that
make this part of the job really easy.

Replace the fill plug, and you're done. I take the used ATF back to
AutoZone.

Notes:

1) There has been some discusison in this forum indicating that the transfer
case will hold more than 2 quarts, but you have to raise one side of the
truck to get the additional fluid in. I don't do that.

2) I like to use a towel to make a dam on the protective cross-member to
prevent the last half-pint of ATF from oozing all over the top of the
cross-member.

3) The transfer case is really close to the exhaust pipe which can be
uncomfortably hot at times. I prefer to change the fluid in the transfer
case about a hour or so after shutting-off the truck.