Routing transmission cooler line questions - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 6 (permalink) Old 03-17-2012, 11:00 PM Thread Starter
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Routing transmission cooler line questions

I am installing an external transmission cooler on my 727 equipped D200. The factory lines run to the radiator and back to the tranny. Is it better have the fluid run through the external cooler first then through the radiator or the other way around?
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post #2 of 6 (permalink) Old 03-18-2012, 05:02 AM
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you can do it either way dosn't make any difference on how much it cools the fluid.

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post #3 of 6 (permalink) Old 03-18-2012, 02:57 PM
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If I was only interested in "cooling" the fluid," I would eliminate the shared radiator unit altogether.

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post #4 of 6 (permalink) Old 03-18-2012, 05:15 PM Thread Starter
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Dosen't the rad cooler help heat it up during the winter? That is also why I am wondering if there is a diffference when routing the lines. I was thinking if I run it through the cooler first it might heat up a little bit when it hits the rad.
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post #5 of 6 (permalink) Old 03-19-2012, 01:00 AM
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There is a heat exchanger built into the side of the engine block for that purpose.

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post #6 of 6 (permalink) Old 03-19-2012, 01:05 AM Thread Starter
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Oh, I was wondering what that was. I just posted something about that, I noticed it while I was under the donor truck tracing the tranny lines.
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