I think its somewhat inaccurate to refer to “Sacred Tradition” and “Sacred Scripture” as two different things, one written, one oral.
The entire apostolic deposit of faith, as it has been passed down and lives in the Church, can be called “Holy Tradition.” A bulk of the Tradition was written, and is what we call Scripture. But alongside Scripture is the Church’s understanding and lived application of Tradition, which we can call “Oral Tradition.”
I don’t think there is any one article of the Catholic faith that is found exclusively in “oral” or “written” Tradition. Everything the Church teaches is in her “oral Tradition,” and is at least implicit in the Bible.