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Mercon VI transfer case fluid compared to GM Auto-Trac II fluid

Discussion in 'Maintenance & Upkeep' started by Loyal Chevy fan, Apr 12, 2011.

  1. Loyal Chevy fan

    Loyal Chevy fan New Member

    I have a 2010 Tahoe 4X4 and the fluid recommened for the transfer case is Mercon VI , it is a single speed transfer case.
    I use to own a 2006 GMC ,Envoy ,4X4, two speed trans. case., and the transfer case fluid recommended for that truck was Auto-Trac II fluid . #12378508, oil is blue in color.

    It seems to me the Auto-Trac II would be better for the Tahoe .

    Here is what it says on the plastic Qt. bottle.----

    For four wheel drive vehicles with automatic transfer case.
    Withstands extended high temperature operation.
    Improved oxidation resistance.

    Does any one know if this is a better quality oil than the Mercon.
    I think I read somewhere it is better oil to resist corrosion of aluminum cases.
  2. clgoch187

    clgoch187 Rockstar 4 Years 500 Posts

    the auto trac is a thicer oil, amd its like $8/ id go with the suggested fluid or amalee has a nice universal synthetic
  3. Blacksheep1

    Blacksheep1 Rockstar 3 Years 500 Posts

    Amalee??? What kind is that.
  4. silveradotrailblazer

    silveradotrailblazer Epic Member 5+ Years ROTM Winner 5000 Posts

    Maybe he means Amsoil?
  5. Blacksheep1

    Blacksheep1 Rockstar 3 Years 500 Posts

    Thats what I was thinking but thought I missed out on a new product.
  6. clgoch187

    clgoch187 Rockstar 4 Years 500 Posts

    it comes from Fishers (Federated Auto), good stuff and its approved to meet or supersede pretty much any trans fluid

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