Got it. Thanks for that info. Unfortunately we need to run through this testing to find the issue. This is most likely a torque converter clutch solenoid but we need to confirm this. I would not replace the transmission for this as it can most likely be fixed much cheaper.
This testing is not easy and requires a scan tool capable of running the tests. So if you don't have it, do you have any friends that have one?
Please see the attached info below for more detail. Thanks.
Images (Click to enlarge)
Sunday, December 27th, 2020 AT 6:11 PM