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Is Type 4 atf compatible with WS?

Discussion in '2nd Gen Tundras (2007-2013)' started by MarcoD, May 7, 2022.

  1. May 7, 2022 at 10:21 AM
    #1
    MarcoD

    MarcoD [OP] New Member

    Joined:
    Mar 5, 2022
    Member:
    #75446
    Messages:
    23
    Gender:
    Male
    Dallas, TX
    Vehicle:
    2010 Silver Tundra SR5 5.7L 4x4 CM
    After looking through the service record I discovered my Tundra had the Toyota Type IV ATF exchanged about 35k miles ago before I bought the truck used. I’ve been thinking about getting the fluid either exchanged or drain/fill. It still shifts like a champ but I don’t know the difference between WS and Type 4 atf. Is one synthetic and not the other? Btw, my local dealer uses BG transmission service, is this good or bad?
     

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