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Old 08-17-2013, 10:06 AM
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transmission cooling

just a curiosity tossed out to some of you guys that know more than me: we all know a cool transmission is a happy transmission, but is there a point where there's too much cooling occurring? is there a problem with running too many coolers? is there "too cool" of an operating temp? what do you think?
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Old 08-17-2013, 10:13 AM
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i know that too many coolerS can affect cooling because the pump is not strong enough to push the fluid through. all the newer trucks run the tranny fluid through the radiator to heat the fluid up in cold weather, so yes you can get to cold
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Old 08-17-2013, 10:23 AM
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I just installed a second cooler and now the power steering and brakes are acting all goofy. Very stiff at idle and from a stop. Once I get moving they seem better. I wasn't expecting that. I lost a little fluid when I switched the lines but maybe a pint total. Seems like a trivial amount when you figure the total volume.

Any ideas?

The Crusher
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Old 08-17-2013, 10:35 AM
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I should have said this is a 2003 F350 with a 7.3l
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Old 08-17-2013, 10:47 AM
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Are you sure you added a cooler to your tranny and not to your PS lines? Take a picture of how you tied your lines in...

They are completely different systems.
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Old 08-17-2013, 11:01 AM
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I'll get a picture posted but the tranny cooler is a small radiator in front of and at the bottom of the main radiator. I don't think the power steeriing has such a system inline.
In the picture you can see the tiny factory cooler and just the bottom of the one I got from a 1997 F250 7.3l.

Thank you for the help. It is greatly appreciated.


transmission cooling-tranny-cooler.jpg
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Old 08-17-2013, 11:03 AM
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I'm not finished with the install yet. I was just running around the block to check the lines for leaks.
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Old 08-17-2013, 11:04 AM
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Yup... You tied into the factory Power Steering cooler...

Please disconnect it.

If your truck is factory it does not have an air to oil cooler. It only has the water to oil cooler. There should be two 3/8" lines coming to the bottom of the radiator, those are your trans cooler lines.
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Old 08-17-2013, 11:20 AM
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*$#@!&%!*^%$

I guess I shouldn't believe my brother-in-law.....the mechanic...... anymore.


I will correct the problem.

Thank you!
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Old 08-17-2013, 11:25 AM
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CSIPSD

So the 2003 models year does not have a air/oil cooler???

Crusher23 that tiny little cooler is the ps cooler, the tranny cooler will fit between the A/C and the inner cooler, mine was about the size of a computer keyboard but I upgraded too the 6.0L cooler, it's huge when you compar the two together.
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