Drive shaft

As for the drive shaft on my car, I tried to get the nut off to take it apart while on the car, but it won't budge there. So I'll have to remove it and somehow get it so that it won't move when really torquing on the nut. I remember the last time I had to do it on the other drive shaft and it took a long time to get to even move. Since I don't have a vise this time, I'll have to come up with some other method.