If you have a rack and pinion system in your car, there are a few ways to tell if it is going bad. One way is to listen for any unusual noises coming from the steering wheel area when you turn it. Another way is to check the fluid level in the power steering reservoir. If it is low, this could be a sign of a leak in the system. Finally, if the car feels like it is harder to turn than usual, this could also be a sign of a problem with the rack and pinion.