Increasing trans temps - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 06-25-2013, 11:40 AM Thread Starter
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Increasing trans temps

I've had a temp gauge for a while now and a tru-kool trans cooler inline with the factory.

Normally, unloaded and in 70-80* weather I'm about 125*. Loaded it might get to 150* or if it's above 90* it'll get to 150-165 (loaded or unloaded).

Lately I've been noticing that in some of the cooler 70 and 80* weather my temps have started to stay in the 150 range, unloaded. I was wondering if this is a sign of anything going wrong or am I being paranoid?

Fluid is still clean and nearly "invisible" on the dispstick and only has about 50k miles on it. Doesn't smell burned at all.



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post #2 of 11 Old 06-28-2013, 08:58 PM
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Read somewhere on this forum about bypass line sticking open causing trans to bypass around cooler. I would pull return line off the cooler and see if getting good flow, maybe flush system just to be safe. Also I believe and I could be wrong but the trans fluid interval is like 30k. Maybe a trans guru will chime and and add more to what I've said.


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post #3 of 11 Old 06-29-2013, 10:28 AM
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do the cooloer bypass its real simple
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post #4 of 11 Old 09-03-2013, 10:39 PM
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do the cooloer bypass its real simple
What is the cooler bypass?

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post #5 of 11 Old 09-04-2013, 02:03 PM
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One the passenger side of the trans there is a tube that connects the two line, you take it out and put in block offs, this makes all the fluid run through the cooler, if ur interested I have a set I'll sell you, get on xdp or ats and look them up they have a little more info on them.
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post #6 of 11 Old 09-04-2013, 03:24 PM
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Quote:
Originally Posted by bigpanther2004 View Post
One the passenger side of the trans there is a tube that connects the two line, you take it out and put in block offs, this makes all the fluid run through the cooler, if ur interested I have a set I'll sell you, get on xdp or ats and look them up they have a little more info on them.
I think it would be better to put a manual valve in there. That way you don't have "too cool" of an issue in cold climates.

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post #7 of 11 Old 09-04-2013, 04:54 PM
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So it is a bypass delete, gotcha, thanks.

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post #8 of 11 Old 09-04-2013, 04:57 PM
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wait your worried about a 150 degree temp in your trans fluid? if so do not worry... that is perfectly normal.... i wouldnt start to worry until you reach over 200 degrees....
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post #9 of 11 Old 10-28-2013, 11:49 AM Thread Starter
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I fixed it. Flushed the fluid out. Back down to 125*. 150 when towing.



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'00 F350
Mods: Nitto Trail Grapplers, Diamo 17 Karat wheels, Red-head Steering box, Autometer gauges, Tru-Cool #4739 trans cooler, BFxenon HID lights
'03 Mustang GT
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post #10 of 11 Old 10-28-2013, 07:17 PM
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curious what fluid you run

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