Anyone pay attention to their trans temp? My 11 would not get above 210 towing my 7000# toy hauler going up a mountain. My new 18 went up to 217 driving up less of a grade with less weight in the trailer. Different trans (6 speed V.S. 10 speed). Any thoughts? Thanks.

 

It's fine. I wouldn't worry unless you get a light or the gauge goes into the red. When it is really hot is a great time to check the fluid level.

 

Normal operating temperature 96°C (206°F) to 101°C (215°F)

 

I knew the newer vehicles need to run hotter for the EPA ratings, but where did you get this info??? Just curious

 

I saw 204* on my '18 a couple weeks ago while sitting in some lunch time traffic on the way home from our shakedown cruise with new TT.

 

The OP is referring to the trans temp. Is that what we are all still comparing? My trans runs about 180* with normal driving, no towing, and even then it takes about 30 min of traffic driving to get there. On a cool day it barely reaches 170.

 

the new trans wants to be somewhere between 205 and 245 F for normal operation. I think hot on the gage might be 260 but I've have to look. On and GM models this is the case.

Reasoning - 1 the new clutches. The new trans uses a carbon fibre reinforced clutch disc set and different clutch materials - likewise the fluid is made to support this. As such it wants to run a bit hotter.
2) the gears don't mind.
3) the fluid is the working prime mover - so the valves and actuators inside are made to work with a specific viscosity in mind - and that's where the temp range is important. There are no syncos - it slips clutches for gear shifts. The gears are stacked differently than your trans of old.

I don't know if ford implements this or not but at one time the GM logic even had an under temp warning because it could prematurely wear the clutches if the fluid was too low. That's probably gone by now though.

 

These transmissions do like to run hot. In the summer unloaded on the highway on flat gorund mine will run around 200 to 204. Loaded up in the mountains it will get as high as 224 at times.

 

How is he supposed to check the fluid level??

 

on level ground - under the truck - on top of the trans body there is a short dipstick - you might even need a socket to loosen it first. PITA.

Serious note - you should never have to touch it other than regular service or if you see it leaking out. The truck will let you know if the temp is too high - and at that point you should pull over and let it cool.

If it makes you feel any better my DD car which has the 6L80E in it will routinely in the summer touch 220 in stop and go traffic. Hot LS3 pushing it down the road. And it's got 159,000 miles on it.