I took my car into Mazda because I was having trouble getting my car into third gear at 4000 rpm. and over. They said that my third gear syncro. was worn and that they wouldn't cover it under warranty. They said they would only cover the repair under warranty if the syncro. broke. This just doesn't sound right. I'm not overly hard on my car. The only gear I've ever grinded in was 2nd. What should I do?