How to revive an old thread

['66 Fury I]

On July 13, 2021, I started a thread, "A-745 Transmission Lubrication". I got some good info from helpful members ending on July 17. Yesterday, I thought I could simply add a new post and revive the thread. I posted successfully, but, it seems the thread did not "revive". It is not showing up under "New Posts". Did I need to do something else?
Thanks, in advance.

 

[Joeychgo]

Its not new to you so it wont show up under new posts until someone else posts in it