I just greesed the drive shaft today, I struggled geting the nut off(large breaker bar and 12stone sitting on it for 20mins, finally did the trick, buggered my hands in the process) the driveshaft however easily pushed back into the hub, guess I was lucky, only a slight tap with a mallet and the nut on the end of the thread free'd it nicely. Pitty I broke the split pin and nissan wont order a new one unless I go in person, trip to halfords it is then!