No need to 'claim' the label. Transgender is an umbrella term for all kinds of gender variant people. It can be used by all of us or not, but it is nothing to fight over.
The problem I see, lately, is that the news media is using 'transgender' when transsexual is more appropriate. And they are using transgender as a noun and even a verb instead of the adjective transgendered.
Oh, well, it is only a convenient label.
Robyn