So, does it seem like the transmission is slipping or not shifting? If the problem is not shifting, I would say the TIPM is going out which is common, but it is easy to replace because it self learns. To be sure you should do a CAN scan which is easy to do, you can get a CAN scanner (Controller Area Network) from Amazon for about $30.00.
Here is a video to show you how:
Here is a scanner link:
Here is how you can change the TIPM out. Check out the images (below). Please let us know what happens.
Images (Click to enlarge)
Friday, September 9th, 2022 AT 12:24 PM