Tranny Temp in the '2017 F250 - Diesel Forum - TheDieselStop.com
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post #1 of 20 (permalink) Old 05-22-2017, 06:30 AM Thread Starter
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Tranny Temp in the '2017 F250

just curious, What temperatures are you all seeing in your transmissions in the 2017's. Just around town driving. My buddy has a F350 and he only see's around 187 I am seeing 200 to 205 around town no towning.

I am also hearing a noise at low RMP when i start to accelerate and when at low speeds like around 10 mph where I dont get out od 1st or 2nd gear. It goes away one I get around 3rd gear or 20mph or so. Almost sounds like a fan clutch roaring or motor reving but RPM stays same. And clue??
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post #2 of 20 (permalink) Old 05-22-2017, 06:46 AM
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My temps are the same as yours with a CC SB F250.


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post #3 of 20 (permalink) Old 05-22-2017, 05:28 PM Thread Starter
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Dock, so you are getting around 200's also? Do you have the noise at low speeds also?
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post #4 of 20 (permalink) Old 05-22-2017, 05:43 PM
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Yea mine runs 198 on the low side and 205 on the high side on normal highway driving no load.

I haven't noticed any noise but I will take a good listen tomorrow morning on the way out.


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post #5 of 20 (permalink) Old 05-22-2017, 06:58 PM
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Mine runs 205 to 210 with a very heavy load with lots of wind resistance (super large truck camper almost 6000 pounds.)
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post #6 of 20 (permalink) Old 05-23-2017, 08:55 AM Thread Starter
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Phillippeterson , What is it just around town
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post #7 of 20 (permalink) Old 05-24-2017, 03:47 PM
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Phillippeterson , What is it just around town
In town is between 190 and 205 depending on outside temp and how much is stop and go.
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post #8 of 20 (permalink) Old 05-24-2017, 04:32 PM
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Phillippeterson , What is it just around town
Air temp today between 70 and 80, tranny temp stayed between 192 and 198 while just running errands unloaded.

Current:
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post #9 of 20 (permalink) Old 05-25-2017, 08:30 AM Thread Starter
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OK so I am not running anything crazy diffrent.

I did narrow the noise to only when I have my AC on.
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post #10 of 20 (permalink) Old 05-25-2017, 03:45 PM
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OK so I am not running anything crazy diffrent.

I did narrow the noise to only when I have my AC on.
If you have the seat coolers they are clearly audible at low speeds, too.

Current:
  • '17 Ford F-350 King Ranch Crew Cab long bed 6.7l V8 (440/925)
  • '06 Yamaha FJR1300AE motorcycle
  • '03 Thor Jazz 2850BH Fifth Wheel

Past:
  • '11 Ford F-350 King Ranch Crew Cab long bed 6.7l V8 (400/800)
  • '08 Ford F-350 King Ranch Crew Cab long bed 6.4l V8 (350/650)
  • '04 Ford F-250 King Ranch Crew Cab long bed 6.0l V8 (325/560)
  • '01 Ford F-250 Lariat Crew Cab short bed 6.8l V10 (310/425)
  • '99 Ford F-250 Lariat Crew Cab short bed 6.8l V10 (275/410)
  • '97 Ford F-150 XLT Supercab short bed 4.6l V8 (220/290)
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post #11 of 20 (permalink) Old 06-17-2017, 08:01 AM
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My new 2017 is running 198ish highway unloaded. I thought there was something wrong the first time I saw this.

I plan on towing a15k full front fifth wheel with this...does anyone know how hot is too hot for this transmission?
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post #12 of 20 (permalink) Old 06-17-2017, 10:06 AM
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I don't know how hot is too hot but 198 is in no way hot. My 2017 has about the same temps as yours.

Loaded heavy and going up and down mountains I never saw above 210 which is also not too hot.
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post #13 of 20 (permalink) Old 06-17-2017, 10:47 AM
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240 F is the new 220 F. Longer oil drain intervals are safer if oil sheds fuel and moisture that gets in it from cold starts and also from regen in-cylinder fuel sourcing. If the oil is 210-220 sustained that is fine with modern high quality oils. Paraffinic crusting that some older oils did at high temps is a thing of the past. Higher temps will evaporate those things from oil. Oil coolers will keep temps in check but coolant temps are higher to support higher efficiency and to do part of the oil temp support. ATF will get hotter due to the trans being bolted to a hotter engine. The secondary cooling system addresses that cooling task but again that thing about adding coolers until ATF is no hotter than 160 F is not the goal of the engineers. They know 200-210 F fluid requires less fuel to pump and good quality ATF that they spec is not stressed at that temp. Heat is shed for sound reasons and not for the "cooler is better" sentiment that we all harbor.

The electric fan clutch is used to keep A/C high side pressure in check and it runs at a lower setting when sitting until road speed supports air flow w/o fan. I think the fan is likely what you are hearing. Turn off a/c and see if the noise is gone or much reduced.

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post #14 of 20 (permalink) Old 08-06-2017, 02:17 PM
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I did 2400 miles from Houston to Colorado (Gunnison, Aspen) in mid-July (2017 Platinum F350 Dually) towing my 28' ATC toy hauler (total gross combined VWR (truck/trailer/stuff) was only 19000lbs) and even flat ground, Texas heat (104 ish on the dash) I saw trans temps 214-236, and about the same when we hit some of those 10% grades in the mountains. I was doing 65 mph, truck wasn't struggling at all obviously with the weight.

I did find this in the 2017 manual:

For high altitude operation, reduce the gross combined weight by 2% per 1000 feet (300 meters) starting at the 1000 foot (300 meter) elevation point.

(with that logic at 10,000-12,000 ft, thats 20-24% or 6,000-7,200 lbs (GCVWR from 30,000 to 22,800) )


For vehicles equipped with 5-speed transmissions, check the fluid at the normal operating temperature of 151F(66C) to 170F (77C) on a level surface.

For vehicles equipped with 6-speed transmissions, check the fluid at the normal operating temperature of 196F(91C) to 215F (102C) on a level surface.The normal operating temperature can bereached after approximately 19 mi

(30 km).



At first I thought it may be hot, but apparently its not. the "meter" part of the gauge never left mid-point, even though when the digital temp gets to 210+ it starts showing the temp above the dummy gauge on the gauge cluster.

Im doing 1500 miles (El Paso and back) this coming weekend, Ill double check the fluid levels, but I think 220-230 isn't a thing anymore.

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post #15 of 20 (permalink) Old 08-09-2017, 11:57 AM
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On my way back from Alaska and carrying a tall heavy camper - 5600 pounds. Up and down mountains at the speed limit the transmission temps are between 200 and 210.
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