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Old 03-15-2019, 10:18 AM   #1
Ken / Claudia
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ford 6.7 towing temps

I have only had the 2013 6.7 f350 for a couple weeks.
I spent several hours on the ford forum. but not any real answers.
Curious to what some of you have seen while towing your RV on long steep grades.
Regarding the turbo psi and the transmission and oil temps. My truck has a turbo gauge showing turbo psi and a degree readout for the tranny and engine oil. I take it Ford does not think the turbo temps need monitored.

Today I checked the tires psi, decal said 65 front, rear 80 psi. I have TPMS system. The front where at 70 psi, I lower those to 65. The rear had 78 psi, I lowered those to 65, since I am not carrying any load. I than test drove it on the freeway and never got a warning light for low psi. So, for now I am leaving it there.
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Old 03-15-2019, 10:22 AM   #2
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I don’t have gauges with numbers on them just the dumb ones the OEM put in the dash. But I run 80 in the front tires all the time because the tires will wear on the outside edges if I don’t. My sticker says 75. When loaded I also run 80 in the rear.
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Old 03-15-2019, 10:26 AM   #3
Logan X
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My 2017 F250 Powerstroke transmission temp is about 200 degrees when towing. I don’t remember what the oil temp is.
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Old 03-15-2019, 09:46 PM   #4
Wyldfire
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Transmission has a thermostat in it to keep the operating temp at around 200. While getting temps up in the 230's on long grades. It designed to run hotter to be more efficient. When it first came out people added aftermarket coolers with no change to temperature due to thermostat. Ford states the new fluids can take temps into 240s. Engine will derate if dangerous temps are approached.
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Old 03-15-2019, 09:49 PM   #5
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Been lots of discussions about it in this forum;

https://www.ford-trucks.com/forums/forum5/
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Old 03-16-2019, 05:05 AM   #6
Roscommon48
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I wouldn't worry, your truck will tell you when you are getting too hot.


normal temp oil is around 200 degrees. higher when going upppp.


Shoot, you are only pulling a small trailer....enjoy the easy pulling, you have a F350! I never used the turbo gauge, doesn't really tell me anything I want to know.


As for tires, just keep them where the truck tells you, keep it simple.
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Old 03-16-2019, 06:31 AM   #7
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Its my default gauge on the little 4' cluster. Oil and tranny run about 200 in town not towing and when towing long steep grades I have not seen above 218 according to the gauge. Ambient outside temp was about 80 and we were at about 2000 ft in elevation above sea level, trailer loaded. when I got that temp.
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Old 03-16-2019, 05:36 PM   #8
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If I remember right the fan engages at around 234 and drops the transmission and oil temps rapidly.
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Old 03-16-2019, 10:11 PM   #9
Ken / Claudia
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Thanks guys, I spent hours on the ford forum site and really not much help with those questions. I will phone the dealer service dept at some point and see if ford lists what temps or turbo psi becomes bad. Guys were mentioning maybe 240 or 260 was ok for the tranny.
For me I would like know what numbers when reached mean cool it down or damage may occur.
If I get any numbers from the service dept I will post what they say. So far this truck shows it's got much more hp than my 2001, rides better and is a lot more quiet. It gets a little better mpg, empty. I hope it will last me many years.
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Old 03-17-2019, 06:39 AM   #10
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Neither of my 6.7 Ford trucks have anything but the basic gauging and I'm good with that...

Drive it like you stole it...

110 in the shade and towing 12K the dually just don't even break a sweat. And honestly by the time you exist the highway and navigate the access road and parking lot the turbo oil has cooled down. Although I've never seen this motor work hard enough to cook the oil.
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Old 03-18-2019, 11:27 AM   #11
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Highest I’ve ever seen was 255 on the oil and 230s on the trans and coolant. It was a warm trip and pushed the truck. They came down real quick when I took my foot out of it or came off the grade

Pulling the grades around Tonopah last fall.

They were unusually long. Ones here in Oregon are over and done with fairly quickly it seems.

I had my oil Blackstoned last few changes and flash point is at 395. So figure I’m fairly safe.
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Old 03-28-2019, 06:19 PM   #12
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Same truck year and model

I run around 200 to 205 on both tranny and water pulling a 40’ Montana. Will see 228 going up long steep grades. Tires I run based on tire recommendation when towing 80 all around. Then unloaded will drop back to 65 in rear. Front wear uneven if not fully inflated. Dropping rear softens the ride some. Turbo gauge only shows how fast mileage might drop. No I watch it for engine strain is about all. Just my two cents. Oh and I have about 80k on truck now.
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Old 04-05-2019, 04:45 AM   #13
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in 112 degree weather towing up a long 10% grade I have seen just over 200 degrees on both pulling 38 foot cougar 330rbk. I run 60 psi in the front and 55 in the rear unloaded and 65 in the front and 75 in the rear loaded. I go by my weight and the tire manufacture load chart. I also dropped my TPMS settings to 50 all around.

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Old 04-05-2019, 08:57 AM   #14
Ken / Claudia
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Thanks guys for the feed back. I was at the Ford dealer this week and asked the service guy at the counter. I think he did not know the answer. His response was the temps should be around 200 to 210 for each.
On the ford forum I read about guys seeing temps in the 240 and 260 degree range while towing heavy/uphill. So far I have around 1200 miles of driving the truck. None while pulling the TT only the boat. I drove a freeway all the way and back PDX to Pendleton OR. About 225 miles each direction air temps in the 40s. I was on CC most of the time. 70 mph there, 80 mph back. Both temps were in the 200 to around 206 range when checked. I got 19.6 mpg there and 19.1 returning. Truck sure does drive nice. West from Pendleton is a 4 to 6 degree uphill grade about 8 miles long. I set the CC at 70 and the truck held it and stayed in 6th gear. Remember that was empty. I learned how to listen to pod casts of talk shows I missed that week, really nice to get caught up and not spin the dail to try stations along the way. I keep asking why did I wait so long to get a 6.7.
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Old 04-05-2019, 10:13 AM   #15
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19MPG highway? I'm lucky if I get 14 on my 6.6L Turbo Diesel.
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Old 04-05-2019, 10:32 AM   #16
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I have gotten as good as 23 mpg in my 2017 6.7l, not towing on an open level freeway. But I average about 16 mpg while driving on streets and in traffic.
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Old 04-05-2019, 10:42 AM   #17
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Hmmm, should I worry there's something wrong with my Duramax? I haven't gotten above 14 yet. Mostly freeway (commute to/from work) with a little city driving.
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Old 04-05-2019, 11:01 AM   #18
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Quote:
Originally Posted by MarkEHansen View Post
Hmmm, should I worry there's something wrong with my Duramax? I haven't gotten above 14 yet. Mostly freeway (commute to/from work) with a little city driving.
I would guess with the dual rear wheels and probably a 4:10 gear ratio, your mpg will suffer a little. Also, I’ve heard it takes some time to break in a Diesel engine and the mpg gets better with age. I have 18k on mine.
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Old 04-05-2019, 11:16 AM   #19
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We have 3.73, but I get your point. We have about 1500 on ours (still has the new-car smell )
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Old 04-07-2019, 03:46 PM   #20
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Ken not sure if you seen my writeup from a bunch a years ago on the Ford 6.7l


https://www.thedieselstop.com/forums...-6-7-a-303470/
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