what is the difference between a fail safe and a servo saver

uh.......ok a servo saver helps you when you hit soemthing with you wheels so that you would not strip the servo gears inside.A fail safe is when your car loses radio range or when the batt pack it dead.

A servo saver is a spring loaded servo horn, that allows the steering to give if you hit something with the front wheels that jars the steering. A failsafe, protects your truck from a run away by monitoring the radio signals being transmitted to the servo you have it hooked up to, generally the throttle servo. If the failsafe detects a drop off in signal, it will set the servo at a pre set position, usually partial brake.