justjimmy

Mine has been as high as 215 while towing my 8,500 lb toy hauler on an extremely how day in South Florida. This only happened when going slowly through towns where lots of shifting up and down occurs.

Normally, on a hot day, it's in the 195-198 range (no towing)

lowew79

Thanks for all the help guys. It sounds like I am overreacting and that indeed the new trucks are designed to run hotter that older generations. I might mention it at my next service just to see if they will have a look, but I'm not worried after hearing from you guys.

If it gets near 220 again (which it hasn't in a while) I'll take it in. Do the parts in a transmission "cool off" or work better after a breaking in period? We are talking about a truck that just now passed 3K miles in the odometer.

CLABRO

I'm at 194* as I type this. 90* outside cruising the highway.

Highest I've ever seen it.

flanneljunkie

I hope you pulled over first.

Highest I've seen was 196F. The manual has a neat scale of tranny temps that are safe and unsafe.

NOLAGT

Mine has 1500

Shovel-ready project

Did you notice what the trans temperature gauge read? The following is from the 2011 owners manual:

4. Transmission fluid temperature gauge: If the gauge is in the:

Normal area The transmission fluid is within the normal operating
temperature (between H and C).

Yellow area The transmission fluid is higher than normal operating
temperature. This can be caused by special operation conditions (i.e.
snowplowing, towing or off-road use). Refer to Special operating
conditions in the scheduled maintenance information for instructions.
Operating the transmission for extended periods of time with the gauge
in the yellow area may cause internal transmission damage.
Altering the severity of the driving conditions is recommended to lower
the transmission temperature into the normal range.

Red area The transmission fluid is overheating. Stop the vehicle to allow
the temperature to return to normal range.
If the gauge is operating in the yellow or red area, stop the vehicle and
verify the airflow is not restricted such as snow or debris blocking airflow
through the grill. If the gauge continues to show high temperatures, see
your authorized dealer

Eboostfx4

Mine run at 195 in normal driving and the hotter i see was 228 in deep snow WOT for about 5min in 4low with 35" tire!!! I dont think it can be more than that !!

tom231

The boiling point of tranny fluid is much, much higher than 200 degrees F. Your transmission fluid would have to get to about 600 degrees F. before it would boil.

Auto Transmission Fluid (ATF) – This fluid is a highly specialized oil optimized for the special requirements of the automatic transmission. It helps protect valve operation, brake band friction issues and the auto torque converter failures that most have heard about. Cannot forget the gear lubrication properties. The biggest killer of the automatic transmission in our eyes is not changing your transmission fluid as required. The boiling point of new trans fluid is 300 to 400 degrees °C. Old abused trans fluid might be like water with a boiling point of 100 °C. That is how people cook or smoke there transmission until it is well done.

http://www.lastchanceautorepairs.com...olingbrook-il/

tom231

It's on the productivity screen.

You go to this screen and choose: Gauge Mode.


Then you will see the Trans. temp.

zx12-iowa

My 5 f150 tranny was 150 unloaded and 160-180 towing. New ecoboost runs 185-195 unloaded depending on outside temp, hills, etc. towing 6k lb bot its in 190s running at 65-75 on hwy.