Hi Terrence,
It is possible that this could help. What you are describing is a transmission slip and old fluid will contribute to this. However, if you have a cut seal then the new fluid will not change the issue.
I attached the procedure plus a guide that will help do this just in case you need it.
If this does not work then unfortunately I suspect you have a cut seal and rebuilding or replacing the unit will be needed.
https://www.2carpros.com/articles/how-to-service-an-automatic-transmission
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Friday, July 19th, 2019 AT 1:11 PM