ecoboost tranny overheating while towing
#1
09-05-2017, 06:10 PM
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ecoboost tranny overheating while towing
i have had trans overheating while towing with my f150 2013 3.5 ecoboost truck. i have been towing about 6000 lbs and the truck is rated for about 11k lbs. the dealer said i should not take that rating literally as that is only under ideal conditions in california! The dealer went thru the tranny and said it looks good and cannot determine why it would heat up so quickly and then return to normal in 5 seconds when i crest. the dealer wanted nothing to do with it at that point. the engine never overheats, just the trans. any ideas out there?
dennis:
dennis:
#2
09-05-2017, 07:34 PM
Are you using the specified Mercon LV fluid and using tow/haul mode? You may want to get an auxiliary transmission cooler with a fan.
https://www.americanmuscle.com/mishi...on-cooler.html
https://www.americanmuscle.com/mishi...on-cooler.html
#3
09-05-2017, 08:46 PM
When is it overheating on you? Just cruising along on the flats or going up some grade? What are your truck specs? Just saying it has a "tow rating" of 11K is for the Max Tow/HD payload optioned trucks.. Is that what you have?
How hot was the outside temp? What elevation where you at? What were you doing to get it to overheat?
Way too many unknowns to say for sure..
Good luck!
Mitch
How hot was the outside temp? What elevation where you at? What were you doing to get it to overheat?
Way too many unknowns to say for sure..
Good luck!
Mitch
#4
09-06-2017, 12:02 AM
And, what is the transmission temperature when you say it overheats? The new 6-speed tranny is designed to run at 200-210 degrees (I don't know what you have in your truck, so that may not apply to you, but you aren't providing enough information for anyone to offer a useful suggestion).
- Jack
- Jack
#6
09-06-2017, 12:21 PM
#7
09-06-2017, 12:58 PM
From BITOG:
The cautionary range (yellow on the dash gauge) is 230-250f. You can run those temps all day without harm.
The "red zone" is above 250. You can run at temps greater than 250f for periods of 30 min at a time without harm.
If it gets above 250, and wont come down driving it (for more than 30 min), you should pull over and idle the engine until the temp comes down out of the red. Do not shut it off with the trans that hot.
These temps and recommendations come from a retired ford transmission engineer that hangs out on other forums, so I consider the info to be as good as it gets.
Also the 6r80 has an internal thermostat which doesn't start to open until about 175f, so it will almost always run higher than that if it is driven long enough to get fully warmed up.
The "red zone" is above 250. You can run at temps greater than 250f for periods of 30 min at a time without harm.
If it gets above 250, and wont come down driving it (for more than 30 min), you should pull over and idle the engine until the temp comes down out of the red. Do not shut it off with the trans that hot.
These temps and recommendations come from a retired ford transmission engineer that hangs out on other forums, so I consider the info to be as good as it gets.
Also the 6r80 has an internal thermostat which doesn't start to open until about 175f, so it will almost always run higher than that if it is driven long enough to get fully warmed up.