Transfer case only
Manual t-case Dexron III
Automatic t-case
NVG 246-NP8 Automatic Transfer Case Fluid (GM Part No. 12378508)
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Bulletin No.: 99-04-21-006
Date: September, 1999
INFORMATION
Subject:
Improved Automatic Transfer Case Fluid
Models:
1999-2000 Cadillac Escalade
1998-2000 Chevrolet and GMC K/T 4-Wheel Drive Pickups and Utility Models
1999-2000 Chevrolet and GMC L Van Models
1999-2000 Oldsmobile Bravada
with Active Transfer Case (RPOs NP4, NP8)
Effective with vehicle production in late June of 1999, all active transfer cases on the above listed vehicles have been filled with Autotrak(R) II fluid, P/N 12378508 (P/N 10953626 in Canada). This fluid is a light blue color rather than the red color of the previous fluids and is the next generation Automatic Transfer Case Fluid. The fluid also contains a better friction modifier. On the models listed above, the active transfer cases should only be serviced using P/N 12378508 (P/N 10953626 in Canada), even if the original fluid was the red Autotrak(R) fluid. The previous fluid and the new fluid can be mixed or topped off if necessary. The new Autotrak(R) II fluid will be the only available fluid once the supply of the old red Autotrak(R) fluid is exhausted on units older than stated above.
The Owner's Manuals and some service information will specify the incorrect fluid due to printing the information prior to the fluid change being introduced.
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Remove fill and drain plugs from back of t-case. They should look identical. drain. reinstall drain plug. fill to the bottom of fill plug like a rear end and then reinstall fill plug
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Your welcome.
