Vacuum hose questions

Discussion in 'The "Juice Box"' started by suntreemcanic, May 15, 2020.

  1. suntreemcanic

    suntreemcanic Well-Known Member

    I have a 66 switch pitch turbo 400 that is going behind a 66 425. The vacuum modulator gets its vacuum from the engine? But just above the vacuum modulator on the side of the transmission there is a steel pipe the size of vacuum line. What is it for? Do these two items connect some how?
     
  2. suntreemcanic

    suntreemcanic Well-Known Member

    Could this be a vent pipe?
     
  3. TrunkMonkey

    TrunkMonkey Well-Known Member

    Yes.
    At the area the bell and main case intersect about the 1-2 o" clock position is the vent tube. About 2 inches long bent down and aft.
     
  4. suntreemcanic

    suntreemcanic Well-Known Member

    OK that is what it is. What does it vent to? Seems like dust could get into the inside, as well as water.
     
  5. TrunkMonkey

    TrunkMonkey Well-Known Member

    It allows the case to vent pressure, and also dump excess fluid if you over-fill it.

    A bazillion transmissions with them, and unless your racing lobsters or up to your windshield in sand, water and dust should not be a problem. :)

    (But extra credit for thinking about stuff that might happen...)
     

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