It uses Trak II transfer case fluid, GM part number 12378508. The fluid goes in a hole, use a ratchet with an extension to remove it, on the side of the transfer case.
Transfer case is lubricated by the transmission fluid.
2.4 QTS.
mercon auto transmission fluid
The 1999 Ford Expedition owners manual shows : 1.9 liters ( 2.0 quarts - U.S. ) of Motorcraft MERCON automatic transmission fluid in the transfer case
1999 Chevy Tahoe automatic transfer case requires 2.2 qts
The recommended transfer case fluid is a SJ-rated 5W30 viscosity oil. One example would be Amsoil 5W30 Synchromesh Fluid. The vehicle requires approximately 1.35 quarts of transfer case fluid.
The fluid level ( MERCON ATF ) should be at the bottom of the FILL hole when you pull the FILLER plug on your transfer case
Manual Transfer case takes DEXRON-III Automatic Transmission Fluid. Automatic Transfer case takes Auto-Trak 11 Tranfer Case Fluid. Auto-Trak 11 is only available at GM dealer.
Change and flush the transfer case fluid immediately.
Motorcraft MERCON automatic transmission fluid
It takes automatic transmission fluid.It takes automatic transmission fluid.
Manual transfur case: DEXTRON-III automatic transmission fluidPush button transfur case: Is the same.