Good morning,
I would do some diagnostics first before assuming anything.
I would check and see if you have any mainline pressure. Without pressure, nothing will work. You could have a front pump failure or torque converter failure and must be ruled out before pulling the unit and inspecting.
https://www.2carpros.com/articles/automatic-transmission-problems
I attached a flow chart for you to follow for the failure.
Let me know if you have any other questions.
Roy
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Thursday, December 16th, 2021 AT 1:25 AM