whilst driving they both shudder and shake, even on the most smoothest road! making them almost impossible to use is there something inside them that could have failed. this is in my ss the clubby ones stay still always.
Pry off the cover on the inside of the door behind the mirror and check the screws the may need to be tightened
I know what you mean, The glass like shudder's all the time... I believe there are spring's inside the mirror that hold it steady. Or some other thing that hold's it, (never opend one up) One of the mirror's on my old car started doing this after i bumped it really hard. I think you will need to open it up, And see if everything inside is connected propley.