2016 transmission temps

[Micsol]

I'm trying to find out if this is normal. My 2016 2500 transmission seems to run warm. The truck only has 3800 miles. But on a recent trip of about 100 miles the trans temp on the evic was running 201-203 with the clutch fan coming on constantly, about 70 degrees outside temp and engine was only 195. *This trip was empty highway cruising. On a short 10 mile run it will get up to 190degrees. Is this normal it seems higher than the temps I got on my 2010 ram. *The temps never climbed above 203 even climbing through the mountains they just seemed to hover there. And like i said this was empty. I'm concerned about the temps ill get when I start pulling my camper. And I bought the truck last fall so *this is the first I've ran it in warm weather

 

[cerberusiam]

Sounds about right for that year. The engine runs hotter the previous years so the trans ends up running hotter also. As long as it doesn't go past 240 you should be fine.

 

[Micsol]

Ok thanks that makes me feel a lot better

 

[DonFitzwater]

My 2016 never runs over 167, max. It's usually around 130-140. My ambient temps are variable this time of year and will run between -50 and 35. My 2014 never broke 195 during 80 degree summer and towing a 12k pound boat. You'll know as soon as you hook onto something and start towing once the weather warms up.*

 

[Jared Herzog]

There is some sort of thermal bypass valve or thermostat that can get stuck. My 68 and Aisin never go over 170 or so. Others have reported the same thing and after some back and forth with the dealer and several temps around 220-230 they get that bypass valve replaced and temps drop. When you add load you will probably get the overheated warnings and have to pull over. The only time my 68 ran hot was before the day it failed. But, it was bad from the factory and happened early.

 

[Micsol]

Oh ok. So what I'm getting isn't normal then

 

[cerberusiam]

A temp around 170 indicates a problem in the bypass, it is bypassing all the time, as does a temp that goes over 230 when towing at speed. Typically around 190 is normal running empty and closer ECT towing. The trans is cooled by coolant so the temps tend to follow ECT pretty close. The difference between 195 and 203 could just be the sensor, it is pretty close. Try towing something and compare to what you are used to, usually about a 40 degree difference from a 2010 to a 2014, assuming everything works correctly. They should be close when running empty.

 

[Cummins2014]

Oh ok. So what I'm getting isn't normal then

No ,I don't think so . I have never seen above 195 towing a 38' fifth wheel in 90 degree weather . In the 170's normally towing flat.

 

[MudChucker]

Hottest I've been able to get mine is towing in the mountains, 13k pound 5ver behind me, temp was 94c (201.2F). I think you have an issue if you are seeing high temps like that unloaded.

 

[Cummins12V98]

Please fill in your public signature. *BIG reason do you have the 68RFE or AISIN? *Normal driving my AISIN is always at 165, towing combined 33k even on 14% grades I am around 172. *My 68RFE would run 172 in 100 degree weather pulling 29K on 6% grades. *

 

[Micsol]

Its a 2016 2500 with the 6.7 and 68rfe

 

[jhenderson]

All of you wih advice need to read post 2.*

 

[Cummins12V98]

All of you wih advice need to read post 2.*

Please explain why?

 

[DonFitzwater]

Please explain why?

Yeah. Bad advice if the OP wants his transmission to last.*

 

[Micsol]

It does cool off with the fan but the fan will cycle on and off constantly. It kicks on at 203 and off at 201F.

 

[jhenderson]

Because Cerb is a cert tech and explained why the trans temp is slightly higher. That is of course unless the rest of you were born with more knowledge than he has gained through his continuing education and work experience.*

 

[kthaxton]

Another vote for something being up. Unloaded mine hovers around 167º....and sometimes it never reaches that.

As for not worrying until it hits 240, Trans Engineer has mentioned numerous times that it is not only temp that matters, but how long at that temp. A transmission that continuously runs 30+ degrees higher than it should, will have a shorter life.

 

[kthaxton]

Because Cerb is a cert tech and explained why the trans temp is slightly higher. That is of course unless the rest of you were born with more knowledge than he has gained through his continuing education and work experience.*

For some reason, the OP's temps are much higher than what others are experiencing. That is reasonable cause for concern. Also, Cerb mentions the trans being cooled by engine coolant (near 195º), however, the auxiliary cooler follows the cooler in the radiator, thus cooling it further.

 

[Jared Herzog]

There was a good flow chart showing how long transmission fluid lasts. It is temperature dependent. At 240 you would probably need to swap the fluid every ten minutes. LOL. At 160 it would last indefinitely or until contaminated.

Edit: looks like 240 is when damage starts. I still only see about 160-170 with the trucks i drive. I still think he is higher and something is going on. #ad

 

[gsbrockman]

Another vote for something being up. Unloaded mine hovers around 167º....and sometimes it never reaches that.

As for not worrying until it hits 240, Trans Engineer has mentioned numerous times that it is not only temp that matters, but how long at that temp. A transmission that continuously runs 30+ degrees higher than it should, will have a shorter life.

Exactly. Based on similar questions on various other forums, the 68RFE and the AS69RC do tend to trend equally in regards to transmission temperatures, whether unloaded or towing. The OP indeed has a problem.....IMO. No disrespect to Cerb.....but I'll bet he does not have the combined seat time of us that are stating there is a potential problem.