Transfer Case Fluid?

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ss444

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Mar 27, 2017
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Location
Long Island
I have found two types of fluid to use for the '99 Yukon.
Dexron-III for the manual and GM # 12378396 for the auto shift.
I have the auto, what does anyone recommend. I would like to
service the case before I start using the 4X4 on the beach.
Thanks!
 
OP
OP
S

ss444

TYF Newbie
Joined
Mar 27, 2017
Posts
8
Reaction score
2
Location
Long Island
I have found two types of fluid to use for the '99 Yukon.
Dexron-III for the manual and GM # 12378396 for the auto shift.
I have the auto, what does anyone recommend. I would like to
service the case before I start using the 4X4 on the beach.
Thanks!
Should have done this first!
Did a search in the TECH area, found my answer in the "Drive Line CLUNK & FIX" thread,
will be using GM Auto TracII (blue).
 

Jazz

Member
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Feb 22, 2014
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There's a sticker on the bottom. Mine says Dex 3 and I'm auto..
 

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