Engine Screeching noise

Car makes a screeching noise when I start it and sit in park, or when I change gears and it goes through neutral for a moment on the way to drive. It was making this noise periodically before my starter died. When I had the starter replaced my car got an evaluation with no other problems ($150) reported. The noise soon became continuous after that and now happens every time. It sounds like you are trying to start your car after it is already running. A loud shrilling noise. I called the garage that replaced the starter and they want another $150 just to evaluate it again.