69 Buick trans cooler question

Discussion in 'Buick FAQ' started by Karma, Jan 5, 2023.

  1. Karma

    Karma Well-Known Member

    I have a 69 buick wikdcat i been putting back together with the 3 speed auto so now my question is can the fluid flow from the cooler any direction? There's 2 metal lines running from the trans to up towards the engine does it matter which hose goes where to the cooler? Also how many qts of trans fluid this thing take? Ps im not a mechanic .
     
  2. Max Damage

    Max Damage I'm working on it!

    I think usually the fluid comes into the cooler up higher and exits lower? At leasing in the factory setup I am pretty sure. Which 3 Speed transmission are you referring to?
     
  3. Karma

    Karma Well-Known Member

    Th400 im pretty sure
     
  4. srb

    srb Well-Known Member

    This is how it should be connected.

    I believe it has about 22 quarts, but you never get all of it out. A lot of it remains in the torque converter.
    I think I first added 6 after pan removal. If it engages you're in the right ballpark. But immediately check, you don't want to ruin your pump.
     

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    john.schaefer77 likes this.
  5. 1973gs

    1973gs Well-Known Member

    I think that you mean 22 pints, not quarts. They hold about 10-12 quarts after a rebuild, probably only 5-7 quarts after a filter change.
     
    Waterboy likes this.
  6. Bens99gtp

    Bens99gtp Well-Known Member


    You want the fluid to enter the cooler at the bottom and exit at the top....this will purge the air out ofvthe cooler so it stays full
     
    Max Damage likes this.
  7. srb

    srb Well-Known Member

    Eh, haha oops, you're right of course :oops:
     
  8. Karma

    Karma Well-Known Member

    How do i know which point is on the trans is the inlet and outlet port?
     
  9. TrunkMonkey

    TrunkMonkey Well-Known Member

    Bottom is hot fluid out, top is cooled return on the transmission case fittings.
     
    Max Damage likes this.
  10. Karma

    Karma Well-Known Member

    Thank you!
     
    TrunkMonkey likes this.

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