as far as I know, the links between transsexualism and autism have not yet been studied per say, but the % of ASD in the trans community is much higher than in general population, much higher, like 20 times higher. That's what the therapist I was working with told me but I doubt these are actual figures, as most Aspies don't know they are Aspies. where was I reading the other day that probably 70% of the Sillicone valley tech nerds are ASD.
Aspergers doesn't exist anymore, since DSM V, it was blended in the autism spectrum disorder, for which symptoms may vary greatly between individuals, but always some can be linked to others, and to functions in the brain that operate differently.
I'm sorry for extending my off topic, but might not be that much off topic. People with ASD have basically a hard time seeing models, they don't see how this prince, princesse or this fighter could be them. It's exterior. They see it but it doesn't relate to them. The person on ASD is like... alone, sees not the links with the other humans like the other humans do, therefore have a hard time defining themselves. They don't relate to anything except very particular things, and usually dress funny (always ends up like that even if you try), so therefore it's very difficult to copy and personify the female model or the male model as imposed by society, so therefore when it comes down: what are you, male or female? one has to chose and many people on ASD seem to go towards the gender they weren't assigned with at birth for whatever reason.
I mean there may not be studies about the links between ASD and gender identity issues but ... i believe there is, and spotting many people here who could be ASD just reinforces that intuition i have.
therefore in my opinion the issues trans people face are not only gender issues, it's a wide range of difficulties to find a place into the society, and maybe sometimes there are other issues one should look at before jumping in HRT, as transition might not take down other very important barriers one has to socially fit and be accepted (as human).
I'm very sorry if my post is too long and wasn't thrown in at the right place or moment, hey, I'm ASD so I have a hard time with that, fitting in