ON A LONG RUN TO LONDON KNOCKS IN THE HIGHER GEARS/70-80mph,OR AROUND TOWN 30-40mph GOING THROUGH THE GEARS, AFTER THE KNOCK IT RUNS SPOT ON.THIS ONLY HAPPEND OCCASIONALY UNTIL YESTERDAY IT HAPPENED 4 OR 5 TIMES, I AM STARTING TO PANIC AS HAVE A TRIP TO LONDON ON WEDNESDAY.
