I'm trying to remember the name of a sci-fi book that would have come out before 2000.
Because of an injury, half the main character's body has been replaced with cybernetics. The only specific thing I remember is that they were imperfect, making running very difficult as the robot half was significantly better. There may also have been a major character who was a good friend to the main character and he was surprised to find they had a sex change to female.
Anyone have any idea what this was?