If I need to grease it, will I need to take the drive shaft out to do it or can I just jack the car up and do this?[/quote]

what car is it btw, if the gatters are ok then all you need to do will cut the clips and pull them back and pack bearings and cup out with grease and recover with cv boot and cable tie in place. if the gatter is split then you will have to remove shaft to put new gatter on etc!