Adding a vent on a 727

Transmission and Drivetrain Tech

  1. 68383GTS

    68383GTS Well-Known Member

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    What is the best way to add a vent to my 727? Transmission is in the car. I am having issues with the dipstick popping out. Thought about drlling a small hole in top of the dipstick right below the handle.
     
  2. Oldmanmopar

    Oldmanmopar Going left turning right FABO Gold Member

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    I never saw a vent on an automatic. You have other issues, Maybe try another dipstick first. I have seen the dipstick rubber bad from age. Could be internal pressure leak. I had a truck do this it was a broken lip seal internally.

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  3. 68383GTS

    68383GTS Well-Known Member

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    I didn't think there was a vent on a 727 either. But I have read there is a vent by the front pump. But this vent is behind the converter.
     
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    • RustyRatRod

      RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

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      Yeah the vent for the transmission is IN the top of the front pump. That's all the vent they need.
       
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      • Rmoore

        Rmoore Well-Known Member

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        There is a opening in the front pump body of the 727 ! The opening is covered up by a tin plate. The tin plate is held on by two of the pump bolts ! The tin plate mounts on to two pump bosses so that the plate is held up above the opening so the transmission can vent ! Hope that helps
         
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        • Rmoore

          Rmoore Well-Known Member

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          • CudaFactHackJob

            CudaFactHackJob FABO Gold Member FABO Gold Member

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            It could be clogged, but I've never seen that. Sometimes the vent is siliconed shut and a new vent is drilled in the top of the case near the back. maybe somebody did that and the new one is clogged.
             
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            • n.y.340 dart

              n.y.340 dart Well-Known Member

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              Ati locking dip stick.
               
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              • famous bob

                famous bob mopar misfit

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                I have read articles on hi h.p. , hi rpm drag cars running trans vents w/ a filter on them up high /even in the interior or trunk.
                 
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