Hello, i'm from Galicia, in the North west of Spain, and where my summer house is, there are lots of Salamandra salamandra gallaica. And the answer to your question is yes, they do squeak, but not every time they are captured. I heard that noise several times during the past years and emitted by males and females, but what I still don't know is what triggers the production of the squeak, because not all the salamanders do it when they are caught.
dino