If a tradition is not Tradition, for instance, the view of a single church father, I treat it as the RCC treats private revelation. Just substitute the words "private revelation" for "tradition"
"Private revelation … can be a genuine help in understanding the Gospel and living it better at a particular moment in time; therefore it should not be disregarded. It is a help which is offered, but which one is not obliged to use … The criterion for the truth and value of a private revelation is therefore its orientation to Christ himself. When it leads us away from him, when it becomes independent of him or even presents itself as another and better plan of salvation, more important than the Gospel, then it certainly does not come from the Holy Spirit." ( Congregation for the Doctrine of the Faith, Theological Commentary on the Message of Fatima , 26 June, 2000 ).