My son describes this issue: When turning the steering wheel to the right from straight ahead when driving, resistance is felt. Applying more pressure to the wheel overcomes the resistance, and then it lessens as the wheel continues to be turned more. He says it gradually goes away as the car warms up. Doesn't happen turning left. Because of that, I'm thinking steering rack. I suppose it could be a strut bearing. Ball joints are relatively new, so I'm discounting that possibility. What do you think? Anyone experienced this?