KD4UPL wrote:
Well, the basics are:
Did you have enough fluid in it?
Do you service your transmission regularly including fluid and filter?
Do you have a transmission temperature gauge? What was it reading?
It could be a computer glitch, could be a trans problem, could be an actual overheat due to outside circumstances.
Well depending on trim level for the instrument cluster the engine and trans temperature should be available on the instrument cluster.
If still under warranty should be somewhat low miles 2018 6.4 with 4.10's, 10,000# should be well within tow ratings.
Differently need a bit more information.
Weather when this happened?
OP states after long hill, how long, and how steep, how fast were you climbing?
Can and did you check trans and engine temp while climbing that hill?
Have you checked the trans fluid level since this happened, and is it correct?
Have you checked the engine coolant level?
Could be just a faulty sensor sending bad data to the management computer, or a slipping trans.