700R4 Transmission Pressures

Discussion in 'Transmission & Driveline Topics' started by Bandit723, Nov 20, 2020.

  1. Bandit723

    Bandit723 Veteran Member

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    Now you got me looking at this again. WOT the geometry is right but from idle the cable does move but not a whole lot until the cable straightens out. I do have the Holley corrector shown on the right of this picture but might be a older version? Not sure what the part number is for the one on the left is "
    20-121" ?
    but i will try an order one.

    TV Brackets.JPG
     
  2. 80sz

    80sz Veteran Member

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    The one on right looks correct , that’s what I was thinking , it’s sorta like a pump cam motion in pump squirters
     
  3. Bandit723

    Bandit723 Veteran Member

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    O'Reilly's is able to get me the one on the left will be in tomorrow. Guess i will see what i get once i try it out.
     
  4. 77 cruiser

    77 cruiser Veteran Member

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    tvcablesetup.jpg
     
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  5. Bandit723

    Bandit723 Veteran Member

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    New corrector came in did change things up. Cable looks to be a bit more straight and does get more travel right off the bat. I did have to adjust it again to gain the full extend for WOT. At idle pressure looks to be at 75 psi which jives with the chart. Reverse is 115 PSI and 2nd and low is at 180 psi.

    Only bear is the rod that controls the flaps on my bug catcher won't clear the cable "always something" pretty sure i can drill a new hole and relocate it.

    20201124_104217.jpg 20201124_104718.jpg
     
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  6. pomartin

    pomartin Veteran Member Gold Member

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    Oh i still remember the nightmare I went through crafting the correct geometry for my pre-Holley acquisition demon, there was always that other thing that needed to be adjusted due to bracket change :p.

    Useful tip: pressure will vary with oil temperature quite some, so make sure you start measuring procedure always at the same oil temperature and use the same procedure- this way you will get data that you could actually compare between tests.
     
  7. Bandit723

    Bandit723 Veteran Member

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    Good tip. Hopefully the weather clears up tomorrow so i can spend some quality on this thing.
     
  8. Bandit723

    Bandit723 Veteran Member

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    ok played around with the Trans this morning went for a short roll with the idle pressures at 75psi did not feel good so pulled over and readjusted back to 90 psi at idle trans went back to acting normal so sticking with caution to the wind and will leave it there. Also futzed with trying to relocate bug catcher butterfly rod. not liking anything i can do on the fly.

    20201128_114221.jpg
     

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