So this is my first truck that I can actually view my transmission temp and i was wondering whats the average temperature I should be at. I often drive around 80 to 85 mph with no significant weight in or on the truck and at those speeds my transmissions between 204 and 206 degrees. Does that sound pretty normal? While were at it whats the average oil temps for those speeds?

 

First, Welcome to the 6.7 forums. I love my 2013. Running those speeds your tranny is at normal temps. The engine oil temp will also run about 205 deg. Make sure when you stop after running high speed you idle the engine till the oil temp gets about 195 before you shut it off. This is to cool down the turbo bearings. Have fun, be safe and let us know how you like the truck.

 

Thank you sir for the tip and the info. I appreciate it

 

Trans temp is normal. It will run a little hotter since model year 2011. It is designed that way.

 

I was under the impression that it wasn't really designed to run hotter but that the temp sender was in the valve body which tends to run at a higher temp and pan temps are still in the 160-170ish range.

 

Your impression is wrong. There is a thermostat in the trans and it's setting will cause the trans to run about 195-205F. The temp sender has been in the solenoid body/valve body area since the first E4OD in 1988.

 

Again, thanks for setting me straight.

My experience has mostly been in the older GM's where guys were putting trans temp senders in the pan and looking for 160-170ish temps.

What are the temps at the main points in the trans - pan, valve body (obviously 195ish), thermostat, torque converter, and any other points that may be of interest.

Educate me!

One thing I have noticed in mine is that the factory gauge will climb in temp until about 140ish (about 40% of the sweep of the gauge) and then it will stop yet the temps on my Edge CTS will continue to climb to the 195ish area. Is that how it is designed, how do they do that, do I have a malfunction somewhere?

 

The gauges in the trucks are really nothing more than idiot lights. Not accurate at all and designed to show a normal range till it gets really hot. I think it was designed that way to cut down on concerns from customers that there was something wrong when really there was not.

 

In my opinion the pan is the second worst place you can put the sender. Only the line to the cooler is worse.

Anywhere from 25 degrees hotter to 50 degrees colder than the test port.

That's about right.

About 195.

Anywhere from about the test port temp up to around 300F is normal.

That is normal. I see they have improved it from older trucks. It used to go right to the middle of normal at 50F and stay there until 230F.

It's done with software. The instrument cluster computer reads the trans temp and decides where to place the needle.

Exactly!

 

I think by "gauges in the trucks" that should be classified to engine temp and tranny temp, because the boost, fuel, RPM, and speedometer seem reasonably accurate.

Actually, it does seem even the engine temp and trans temp gauges are reasonably inline with actual readings. But I do agree the goal of the "damped" gauges is to make the customer not worry.

 

It hasn't worked. There seems to be a new post every day about a buzzing/hissing/thumping/grinding/chirping/etc. that turns out to be normal. These things have more computing power than the first spaceships to the moon. I do routine maintenance on the known wear areas and unless the truck won't run or lights start flashing on the dash I'll just assume everything else computer wise is ok. That and use a trick I learned from an old mechanic many years ago - whenever you hear a new sound just turn the radio up a little louder.