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Old 05-20-2012, 02:39 PM
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Hot trans temps!

I recently installed a trans temp sender and gauge and the readings from it are saying close to 200* and this has to be bad. I live in texas and read somewhere that the trans cooler runs through the radiator and this hot weather i should take the line out from there and install a 6.0l trans cooler? i want to do a flush soon, what fluid should i use, i read merconv is that right? ideal temp is around 185 correct? insight into this would be helpful as i know very little about transmission issues.
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Old 05-20-2012, 03:21 PM
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Use DexIII/Mercon.
IDEAL temp should be, unloaded, cruising, 150*F ish. That's what mine runs but that's with just a small cooler.
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Old 05-20-2012, 03:22 PM
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holy crap i need to get it down then, any opinion on why its running so dang hot? and what are my options on trans coolers, i look on ebay or somewhere and they have numbers that mean nothing to me
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Old 05-20-2012, 04:07 PM
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A 6.0 cooler is a great one but idk if they are a direct bolt on for OBSs. The V10 cooler is good.
What are you going to be doing with the truck?
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Old 05-20-2012, 04:33 PM
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daily driver and tow a bass boat, usually long hauls back and forth to college. is the temp i am seeing normal which can be lowered by a cooler? or is there problems
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Old 05-20-2012, 04:58 PM
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Not sure. There might not be a problem other than cooling.
Could have a clogged cooler or lines. Checking the flow would be the way to check that.
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Old 05-20-2012, 05:38 PM
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On my 05 6.0 my Tranny runs around 165, and it doesn't seem to matter if I am pulling my 9k lbs fifth wheel camper or running empty. Someone told me this was a normal temp but then again you have the older style truck as well. I would at least try to get it into the 160's, a bass boat is not that much weight if thats all you pull.
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Old 05-20-2012, 07:10 PM
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how do i check flow, if there is a problem with flow will having the trans flushed by a trans shop fix this?
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Old 05-20-2012, 07:18 PM
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On my 97 I had hot temps too. I had a Hayden cooler put on, which helped quite a bit. Then I added a tru-cool to the Hayden and my temps were good.
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Old 05-20-2012, 07:23 PM
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is it feasible to see my temps drop from 190 ish to 150 with coolers? if so which cooler/coolers will work best, with fan or without
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