are you setting the servo's endpoints correctly? otherwise your servos will get fried, but that does not seem to be the problem, because they work well in your other cars.
This is a very difficult question. Have you seen your LHS about this one? Youshould if you haven't.
I guess you could switch your whole radio system from your other cars, rather than just your servos. If this helps, then I suggest that you send in all the stuff you took out of the tg10r.
Other than that, I can't think of anything else right now.