If I turn my steering wheel all the way to the right, there is a clunk sound when it reaches the end. The sound doesn't happen everytime I turn the steering wheel all the way to the right repeatedly, but happens atleast the every first time I turn the whell all the way. Plus, I've been noticing a poor ride as well at highway speeds. I know my tires are almost worn out, but there is some vibration at highway speed. I'm not sure if the to problems are related, but what do you think?

Thanks!