Transmission fluid

Discussion in 'The "Juice Box"' started by 455 Powered, May 13, 2020.

  1. 455 Powered

    455 Powered Well-Known Member

    It’s been a long time since I’ve ran an automatic transmission. 30 years or more and I’m wanting to know what type fluid to use in a performance 400. I always used type f because it gave very firm shifts. Any help is appreciated
  2. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    I think guys still use the Type F fluid. I just used synthetic Dex 6.
  3. Bens99gtp

    Bens99gtp Well-Known Member

    Type . Dex merc. About anything works in them
  4. 455 Powered

    455 Powered Well-Known Member

    Thanks guys. I’m leaning towards dex merc.

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