This sounds like the torque converter clutch solenoid is failing when it gets hot. I would start with checking the fluid and making sure it is not burned. If it is then your clutch is slipping.
So I would replace the TCC solenoid if the fluid is burned and change the fluid. However, if the fluid is not burned then just the solenoid would need to be replaced. I attached the info for this.
Here is a manual on how to change the fluid:
https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
Let us know what happens. Thanks
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Wednesday, November 25th, 2020 AT 7:50 PM