I think it depends on your T. From what you wrote here, it sounds like it might be a good thing to talk about, express it and find that healthy way of dealing with it.

I turn my anger onto myself. It has been good to be able to talk to T about getting angry about something related to T or our relationship and have her keep it about me, not get defensive or hurt (not display defensiveness or hurt) and always come back with that we are ok - both verbally and behaviorally. It's been hard work for me, I think it has been good work too.