Transfer Case Fluid Confusion

[Scotty54]

Vehicle is a 2006 Z71 Tahoe with auto 4WD and Stabilitrack.

My T-case has trans fluid in it right now. I checked the manual and it's a little confusing. It says for AWD with Stabilitrack use Dexron III. I think I jumped on this seeing the word "Stabilitrack" and that's what I used last time (the only time I had changed the fluid). Now I see for the auto T-case I should use Auto-Trak fluid. Can some of you confirm this?

If I have been using the wrong fluid for the last 50k miles, have I caused a problem? I have only been off-road once but I frequently shift to auto 4WD and 4HI just to keep things lubricated. Everything seems to work fine.

 

[HiHoeSilver]

From the 06 manual.



Can't really speak to any damage that may have been done. But you're right. It should be Auto Trak II.

 

[Fless]

Look for the TC RPO code on the list in the glovebox. Should be an NP-something. What is it?

 

[Scotty54]

NP5 - applies to steering wheel, and NP8 for the TC

 

[Scotty54]

I din't know the RPO codes were there. Thanks Fless.

 

[HiHoeSilver]

NP5 - applies to steering wheel, and NP8 for the TC

Yes. The np8 is the nvg246, so auto Trak II it is.