When you apply the brakes, it will affect all wheels. Do not use the parking brake for normal stopping. It doesn't do as effective job as all 4 wheels. And it would take much longer to stop the car. The parking brake is just that. For extra braking on hills n' such. If you have an auto trans, putting the car in P on flat surfaces is enough. If you have a manual trans, putting it in reverse or first is also enough on flat ground.