2024 chevy l8t with 10 speed allison temps

[Aimatdeer]

When it's cooler outside driving stop and go around town or interstate 144 is pretty much as warm as my trans gets. But when it warms up outside driving around town it goes up in the 150s and 160s. Waiting in a drive thru long enough I have seen over 170. Is this normal or am I concerned over nothing? It does cool down a little when I start moving again.

[newdude]

39 minutes ago, Aimatdeer said:

When it's cooler outside driving stop and go around town or interstate 144 is pretty much as warm as my trans gets. But when it warms up outside driving around town it goes up in the 150s and 160s. Waiting in a drive thru long enough I have seen over 170. Is this normal or am I concerned over nothing? It does cool down a little when I start moving again.

 

 

Normal.  These have a thermal bypass valve aka a thermostat.

Edited March 31, 2025 by newdude

[64BAwagon]

Compared to earlier GM trucks those temps are great. The highest I have ever seen on mine while towing my fifth wheel is 184 and that was in stop and go in FL. 

[Aimatdeer]

Yeah I had a 2014 1500. It ran just under 200 all the time. Until I did the delete of the thermostat where the lines came out. I never had any trouble with it though probably because it 168k miles I had changed the fluid and filter 4 times. Still trying to decide when I am going to have the new trans serviced. 30 or 40k.