Well if it is spinning and not engaging the flywheel or torque converter then it is still bad. The way the starter works is it has a small gear that engages the teeth on the flywheel/torque converter which in turn spins the motor. That small gear in the starter, when activated, comes out of the starter. It can break to where it wont come out anymore but still spins inside of the starter. Your not being very detailed when you say what is going on. Until you decide to give MUCH more detail and a step by step of events then this is where my help stops.