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Trans cooler lines

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by JIM88K5, Dec 8, 2001.

  1. JIM88K5

    JIM88K5 1/2 ton status

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    Which line is the return line.(To trans from rad). Doing aux cooler install and intructions say to plumb into trans return line.
    Is it the upper line on the radiator or the lower that is the outlet? Thanx-Jim

    88 5.7 5in lift 35"procomp at's
    700-208-456-3in exh w/flowlowder 10 bolts & some ORD stuff
     
  2. Wingnutt

    Wingnutt 1/2 ton status

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    If I remember correctly, and you are still running the 700R4, the top line out of the tranny is the pressure line. You will have to trace it to the radiator, but then you know which is which.

    Yer born at point "A" & yer gonna die at point "B". Kick maximun arse in between.
     
  3. Highlander

    Highlander 1/2 ton status

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    What I did with mine was with the K5 cold I started it and put my hand on the lines the one that got hotter first was the output and the other the return.

    Eric

    <a target="_blank" href=http://cethern.tripod.com/erics-home-page-and-other-stuff/>http://cethern.tripod.com/erics-home-page-and-other-stuff/</a>
    AMSOIL Dealer # 529948
    Cethern@interfold.com
     
  4. Smitty

    Smitty 1/2 ton status

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    If the radiator heats up faster than the transmission wouldn't this theory be backwards? I'd guess that the fluid could be warmer after it runs through the cooler in the radiator upon initial warm-up if your anti-freeze heats up faster than the Dextron. Just a thought and I don't really know how long it takes a transmission to warm-up while it's just sitting there at idle.

    Smitty
     
  5. Highlander

    Highlander 1/2 ton status

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    When I did it this way my tranny line got warm pretty fast All you looking for is the temp. change Try it sometime with your Eng. cold.

    Eric

    <a target="_blank" href=http://cethern.tripod.com/erics-home-page-and-other-stuff/>http://cethern.tripod.com/erics-home-page-and-other-stuff/</a>
    AMSOIL Dealer # 529948
    Cethern@interfold.com
     
  6. Smitty

    Smitty 1/2 ton status

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    I'll give it a try. I have my new cooler mounted in front of the radiator but just plugged the inlet and outlet until it warms up again. I've got a new 4-core and figure I'll stick with the cooler in it through the winter.

    Smitty
     

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