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Discussion Starter · #1 · (Edited)
Hello,
Was a member a long time ago but lost passwords/login bla bla, starting all over again!
We bought a new (used) 2019 F250 stock, pulled our toyhauler this past weekend and the engine temp got up to 221 degrees and the transmission went up to 235 degrees, I am not sure if either of those are anything to worry about, i tried to search on this site and other but could get any good info. there were 2 hills that were pretty steep but the truck pulled great no issues with that. Please let us know if this is anything to monitor.
Thank you in advance.
 

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was that oil temp or coolant temp?

The primary and secondary systems both have two thermostats, lol so we technically have 4 thermostats. The primary cooling system is the only one you can see unless you hook into Forscan. So lets assume your monitoring the primary coolant temp (ECT #1). the first stat opens at 194F and the second (bigger one) opens at 201F. So 221F is probably nothing to worry about because you were working the truck hard. Was this under full load up a hill? idling? down hill with tail wind?
 

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Discussion Starter · #3 ·
Uh not sure on the oil or coolant, was monitoring the engine temp on the dashboard probably the coolant temp, and was looking at transmission temp on the selections. The truck was under full load up hill, about 10K pounds. the temp seemed to go down while going down hill. What are your thoughts on the tranny temp?
Thank you,
 

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just got back from a 600 mile trip with my 1 ton. I had a sportsman in back along with other stuff. About 1,000 lbs in the bed. Air temp was 88F, had the AC on and made some good pulls up grade in the UP of michigan. ECT #1 stayed solid at 195-197F, tranny bumped to 201-203 along with oil temp.

I'm assuming if I had a big load, say 10-12k behind me. Those numbers would have crept up like you saw.
 

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I dont see much of a problem with those temps. However High heat is the reason I only use Motorcraft full synthetic oil in my truck. There are 2 temps in the inmfomation center. One is oil and the other is transmission. The water gauge is above the info center. The termps drop surprisingly fast when going down hill. The truck will go into limp mode if it gets to hot. Enjoy the truck and don't worry to much.
 

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The truck will go into limp mode if it gets to hot.
This! These trucks will protect themselves if something like that gets out of whack!
 

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I dont see much of a problem with those temps. However High heat is the reason I only use Motorcraft full synthetic oil in my truck. There are 2 temps in the inmfomation center. One is oil and the other is transmission. The water gauge is above the info center. The termps drop surprisingly fast when going down hill. The truck will go into limp mode if it gets to hot. Enjoy the truck and don't worry to much.
Ford does not make motor oil, they buy it from the best price supplier
 

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trans temps over 225 will cook oil i have always read? On our 7.3 even in the heat here in AZ i have never seen over 175 towing up hill. It has a 6.0 cooler for the trans as well. that is with an ambient of over 110< that is not even a hot day here. trans temp sound way to hot at 230+ to me for a auto to last very long.
 

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trans temps over 225 will cook oil i have always read? On our 7.3 even in the heat here in AZ i have never seen over 175 towing up hill. It has a 6.0 cooler for the trans as well. that is with an ambient of over 110< that is not even a hot day here. trans temp sound way to hot at 230+ to me for a auto to last very long.
This post is just chock full of misinformation.

For the benefit of anyone reading this thread, disregard what he posted. It's all wrong.
 

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Lets go fallacy. Maybe en-light how 235 trans temps are fine. Or just ban me.... eloi
 

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When I was an automatic transmission engineer at Ford we tested these transmissions well above 235°F. They don't cook and die at those temperatures. The internet doesn't believe that, and you are welcome to believe what you like.
 
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