Tranny and oil temp - Ford Powerstroke Diesel Forum
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post #1 of 18 Old 03-02-2008, 04:41 AM Thread Starter
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Tranny and oil temp

Under normal driving (unloaded on the freeway) I usually stick at around 150 to 160 on the tranny and 190 on the engine oil (according to my evo2)

Yesterday I pulled about 2,500 pounds about 200 miles. It was around 75 degrees outside and my tranny temp was at about 175 to 185 and the oil was about 200 to 205 most of the trip. I was doing close to 70 with the cruse control (2000 rpm)

Does this sound normal? I was kinda surprised that the tranny got that hot with such a light load?

Also what is the max temp I should stop at for the tranny and engine oil?

Just a basic 01 F350 CCLB SRW -Good from a far but far from good
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post #2 of 18 Old 03-02-2008, 05:27 AM
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Those numbers sound normal to me. The engine oil may be a little high but as long as it is within 20 degrees of the coolant temp you're good. The tranny cooler on a 7.3 leaves a lot to be desired. Although your tranny temp was still within a safe range, I would suggest an add on cooler or swap in a 6.0 tranny cooler. I wouldn't want the tranny temp getting much higher than that.
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post #3 of 18 Old 03-02-2008, 04:18 PM
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What would cool down the tranny better? Replace with the 6.0 cooler or add on a secondary cooler like the Trucool 40K.
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post #4 of 18 Old 03-02-2008, 04:23 PM
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those numbers sound normal.... if you want to lower the temps you have 3 seperate ways of doing it... upgrade the stocker to the 6.0L or the V10 cooler, add a secondary cooler like the trucool one your talking about or get a secondary with a buit on fan like the one i run on my truck.... i never see over 150 during regular driving(fan not on) and over 180 towing(fan off) if i turn on the fan it will easily drop it down like 30degrees... Stealth Automotive. Oil Coolers

let me know if you have any questions

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post #5 of 18 Old 03-02-2008, 05:17 PM
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i wouldnt worry about those numbers at al!!!!
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post #6 of 18 Old 03-02-2008, 05:23 PM Thread Starter
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When the shop rebuilt my tranny they put on a second cooler. its not as big as the tru-cool max but i think its like the one that is one step smaller. so the lines enter the radiator, exit then go through the one they added and then back to the tranny. my truck did not have anything but the radiator cooler (pretty strange if you ask me for a f350 made to haul...)

so the one i got is attached behind the intercooler pretty low (about where the bumper is) so i was thinking that being attached to the intercooler it will pick up lots of heat and being behind the bumper area there is not very much air hitting it.... so i think a tru-cool max is in my future...

raul - that one you sell with the fan, does that come with hose and mounting parts? is it the same one that is on your truck now? it looked like a pretty sweet setup when i saw it last visit to kalifornia.

Just a basic 01 F350 CCLB SRW -Good from a far but far from good
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post #7 of 18 Old 03-02-2008, 05:26 PM Thread Starter
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So at what temp should i pull over and let her cool down?

Just a basic 01 F350 CCLB SRW -Good from a far but far from good
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post #8 of 18 Old 03-02-2008, 05:31 PM
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210 temps are in the high side... the fan coolers are only the cooler... and yes its the same kind that is on my truck....

but like marc said those numbers dont sound that bad....
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post #9 of 18 Old 03-02-2008, 05:34 PM Thread Starter
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Yea i was only pullin 2500 pounds. the temps went higher then i would expect them to go pulling nothing. i dont think i have seen over 150 empty....

I guess i will wait till summer when i pull the boat and see how things go. my boat loaded is about 5k plus all the other crap in the bed of the truck. if the temps get much higher ill probably get one of those coolers with the fan. i like the idea of extra air being moved if i am going slow.

Just a basic 01 F350 CCLB SRW -Good from a far but far from good
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post #10 of 18 Old 03-02-2008, 05:43 PM
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I have problems with my oil getting to hot as well. I was pulling about 8,000 lbs the other day and my oil was at 243 degrees. Even unloaded on trips on the freeway for a hour or so the oil still runs at about 230 degrees.

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