There is a thermostat in the transmission to keep the temp up. Don’t expect it to be lower and everything up to 245 is considered normal range.

 

Will it dial back power on the 5.0? Reason I'm asking is my friend has a eco boost, I have the 5.0. Similar trucks for loaded, other than he has 3.73 gear I have 3.55. I helped him move a few months ago. He had probably 5k lbs on his trailer I had that if not a hard more. Both trailer are 12 ft no brake. I was following him and it like he hit the brakes a few times when his cut power while I still pulled fine. He said his trans temp was at 220, mine was around 215 to 220. It seems to high to me but I think old school. Once his cooled off a bit he pulled past me like I was sitting still. Thanks for the info, I plan on getting a Banks Super gauge to monitor stuff eventually.

 

Sounds to me like ya'll were not just towing , but trying to race each other with trailers which would explain the high temps. I tow a 6k camper up and down the east coast and average 206, Highest I've ever seen is 212 in the mountains on a 100 degree day.

 

Not trying to race, I know the eco is faster than the 5.0. I was following I'm from GA back to SC, mostly back roads. So hills here and there, and turns. I had mine in tow haul mode, I'm assuming he was to. This is my first F150 and automatic truck so it's some what new to me as far as towing. When I have two atvs on the trailer it barely hits 205, when it does it will hot 205 then bounce right back to 197. I've read up on the temperature and feel more comfortable about it. Just never heard of them cutting back power due to transmission temp. Overall very happy with how it tows, no issues just curious.

 

No idea, I have the Ecojunk motor. I would guess the 5.0 doesn't do this.

 

Normal unloaded temps will range between 190-205* depending on speeds and grades.

While towing, depending on grade, speeds & weight it not uncommon to see temps as high as 230-240*

As it was mentioned the tranny has a thermostat that keeps the temps in the 190-205* range so installing a larger cooler(I have one so I know) won't get the temps any lower. What it will do is help keep the temps closer to that Ranger when towing and help bring the temps back down to that range if they do increase.

The cooler I have is a Ford OEM cooler that is a direct replacement for the stock cooler.



Wayne

 

a.k.a. The desert transmission cooler (F-150's shipped to the middle-east)
.

 

I know, I have one 😁

 

So the larger cooler will try to keep it closer to the operating range basically? I've been told on older Dodges to get the largest cooler possible, that's a Dodge thing I guess. I plan on doing a filter change at 100k on my F150. Have also thought about gettng the Mishimoto trans cooler when I do the change, how is the bigger factory cooler vs the Mishimoto? Looks like its rought $100 for the larger factory cooler vs over 300 for the Mishimoto one. I'm guessing it's not worth 3x the cost if they dont truly help the temps drop vs help try to maintain the temps.

 

Yes, it's thermostat'd - basically the larger cooler has more ability to keep the temps within spec over a larger external temperature range as well as during heavier stress situations.