I have a 7955TG that all of a sudden went dead on me.
I live in Europe so i was told to send it to Germany (I'm in Sweden)
I didn't have to prove anything, just send the servo to a guy called Dieter Woerner at MULTIPLEX Modellsport and he would take care of me, no questions asked. I late found out the MULTIPLEX Modellsport is the European distributor for Hitec and Traxxas.
I also have a broken 5645MG but I lost ONE gear from it wile taking it apart so I can't send it to them. That's a shame!
I hope I get my 7955TG back soon!