Hi I am new to this club and Ive had my mk4 astra 1.8 sri for a month now . Its a great car but theres one problem.. I had it at a quarter mile strip race the other weekend and as its racing I use high rpm. My clock goes to 7000 rpm and i was taking it up to 6000 in each gear to win the race but my gears locked in 4th at 6000 ? I tryed again and its still locking but if I change gears at 5000 it does not lock but it locks again at 5500 ? is this normal like a safety mechanism for the clutch or is there a fault somewhere ? any help would be great