Noticed over the past week, a 'whoop-whoop' noise from the rear, got proceedingly worse, dropped the car into local Ford today and they called me at lunch saying the diff is cactus and a new one has been ordered. Great Service on their part, but after a fuel line breaking when 2 days old and a few other problems it does leave one feeling a little uneasy (the car made on a friday afternoon maybe!?!?)...anyone else had a diff prob on an AU2 (I believe AU series 1 had a few diff probs but they were sorted put by series 2?)