Guys, i m having this problem lately after hari raya road trip.there is some knocking sound infront left wheel while goin uneven road at slow speed..no knocking sound above 60kph another one is while at highway turn slight right (steering position pointed slighly before 1 o'clock) the whole steering vibrate violently and knocking sound can be heard too..only happens speed above 80kph....but straight,left turn and slow speed doesnt happen....isit a lower arm bushing issue???? or steering rack??