The transmission keeps overheating?

It sounds like the battery is going bad but to be sure we need to run a CAN scan which is easy and if no codes come up replace the battery. Here is a guide and video to show you how. You can get a CAN scanner (Controller Area Network) from Amazon.

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Here is a list of CAN scanners starting at about $25.00 on Amazon:

https://amzn.to/3DBMlc7

This guide can help load test the battery without equipment and how to replace it in the images below in case you need it:

https://www.2carpros.com/articles/car-battery-load-test

Check out the images (below). Please let us know what you find.