Hi,
If it is slipping, it can be caused by a few things. First, is the fluid clean and full? Also, things like low transmission line pressure or worn clutch packs can cause it as well.
Is this the original transmission? Also, if you haven't already, I need you to check the transmission fluid level and condition. When you check its condition, see if it has a burnt smell to it. Keep in mind, transmission fluid is a reddish color. See if it is dark brown or even black.
Here is a link you may find helpful:
https://www.2carpros.com/articles/how-to-check-and-add-transmission-fluid
Let me know what you find. Also, let me know if the check engine light is staying on when the engine is running.
Take care,
Joe
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Saturday, June 24th, 2023 AT 10:28 PM