Trans overheating after 4 hours of straight driving

[Scottnbellamy]

Anyone experienced this?
2018 Suburban

 

[zora]

Anything blocking the radiator?
How do you know it's overheating?

 

[Scottnbellamy]

Nothing blocking radiator
Warning message Comes on around 4 hours
“Transmission Hot put in Idle”

 

[zora]

Nothing blocking radiator
Warning message Comes on around 4 hours
“Transmission Hot put in Idle”

Have you ever changed fluid and if applicable filter?
Have you checked fluid level and whether it smells burnt?

 

[Scottnbellamy]

both yes
It now happens 5 times in a row
But only after 3.5-4 hours each time

 

[zora]

both yes
It now happens 5 times in a row
But only after 3.5-4 hours each time

Take it to a shop that can scan transmission codes