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Old January 24th, 2009, 09:42 AM   #1
mideerslayer
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Default trans cooler question

Someone told me the other day that they by-pass the trans cooler and plug it right into the radiator? Id this even possible?
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Old January 24th, 2009, 10:48 AM   #2
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what are you cooling? if its an auto trans theres a point where it needs some heat to operate correctly. most people attach an aux cooler after the radiator out put to peel off more heat. best operating temp for most autos is around 180*F it gives the best life and shift operation.
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Old January 24th, 2009, 11:18 AM   #3
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Originally Posted by Yetti View Post
what are you cooling? if its an auto trans theres a point where it needs some heat to operate correctly. most people attach an aux cooler after the radiator out put to peel off more heat. best operating temp for most autos is around 180*F it gives the best life and shift operation.
01 cummins with auto trans I use it to plow with

There is a trans cooler on there but since I plow with it i want to get it as cool as I can, should I add a second one?
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Old January 24th, 2009, 12:00 PM   #4
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add one with a fan the b&m ones turn on at 165 and keep it plenty cool
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Old January 24th, 2009, 06:03 PM   #5
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You can over cool a tans in the winter. Some transmissions have functions such as cooler bypasses when it is cold until the trans gets up to operating temp. Also on some transmissions the torque converter will not lock up when it is too cold, again in order to warm up the fluid. So unless you know what your trans temps are, and what they should be for your truck I wouldn't add any more coolers till you get some base line temps.
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Old January 25th, 2009, 09:08 AM   #6
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best operating temp for most autos is around 180*F it gives the best life and shift operation.
Got anything to back that up?
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Old January 25th, 2009, 09:42 AM   #7
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http://www.tciauto.com/Products/Tech...expectancy.asp

This good enough? Google is your friend.
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Old January 25th, 2009, 09:50 AM   #8
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http://www.tciauto.com/Products/Tech...expectancy.asp

This good enough? Google is your friend.

I want to see something that says over cooling a transmission is harmful to it. I did hours of research on this subject before adding coolers to my rigs and never found a thing that said running it "too cool" is a bad thing.
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Old January 25th, 2009, 10:05 AM   #9
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Running too cool would leave condensation in the fluid. It can take the material off the clutches if there is too much condensation in it.
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