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Stupid newb tranny question?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by trailblazer87, Nov 10, 2002.

  1. trailblazer87

    trailblazer87 1/2 ton status

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    Madera, CA
    How much line pressure is there on the cooling circuit for a 700R4? I am busy trying to figure out how to run my new cooler lines. Thanks.
     
  2. milspecjimmy

    milspecjimmy 1/2 ton status

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    im not sure exactly, but it shouldnt be a ton, however there is enough to make one leak or pop off if it isnt clamped tight.
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  3. RATAH

    RATAH 1/2 ton status

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    im not sure if this line psi
    but here is whats in my book
    THM200-4R and 700-R4 oil Pressure test chart

    Range
    Neutral 1000rpm Brakes applied 55 to 75psi
    Low or D2 1000rpm Brakes applied 160 to 190psi thm 700r4
    low or D2 1000rpm Brakes applied 120 to 160psi thm 200
    drive 1000rpm Brakes applied 55 to 75 psi
    Reverse 1000rpm Brakes applied 85 to 140 psi
    hers the info for THM 350 and 400
    Range
    Neutral 1000rpm Brakes applied 55 to 75 psi
    Low or D2 1000rpm Brakes applied 130 to 160psi for the 400
    Low or D2 1000rpm Brakes applied 85 to 110psi for the 350
    Drive 1000rpm Brakes applied 60 to 90psi
    reverse 1000rpm Brakes applied 85 to 150psi
    sorry it doesnt say if that line psi
    it only says checking it off the test port on the trans
    hope this info helps
     
  4. imiceman44

    imiceman44 1 ton status

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    No, these numbers are inside the tranny, for pressure on the clutches.
    The line pressure is much less than that.
    What is the reason you want to know the pressure?
    You can use steel, rubber or even copper line.
    That is what I have used for more than 10 years and you can shape them very easily, and they don't rust.
    Please let us know why you want to know, maybe by then someone that knows exactly, will chime in.
     
  5. SWAMPRNR

    SWAMPRNR 1/2 ton status

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    25 to 45 psi line pressure is normal for the transmission cooler lines.
     

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