306 steering judder and wheel squeek

reaches over 50 miles per hour. Its like its bumpin along the road and doesnt stop till speed goes down. Feels dangerous on motorway when it does that. Mechanic saud was brake judder and i had the brakes replaced and still problem wont go away. The wheels squeek whenever i turn sharply as if bits of metal are rubbing against each other. What could it be??? Desperately need help?????? Please

You might need to get your wheels balanced, normally when you get vibrations coming from the wheels at speed that is the cause.