Steering wheel vibration after new bearings and oxygen sensor

[steveaw]

Hello. I don't really know much about cars or repairing parts, but today I had new bearings put on my tires after having a loud screeching noise when i would turn the steering all the way (parking). It turned out my right front tire was really wobbly and so i had new bearings installed. I also had the oxygen sensor replaced. The screeching noise is gone but when i make turns at a slow speed and when backing out the steering vibrates along with the wheels im pretty sure. Vibration stops after wheels are straight. Doesn't vibrate when speeding up. Also had a new used engine put in a few weeks ago. Any ideas? Thanks.