how do u change the drive shaft?

You shouldn't have to change anything except the shaft, unless you are aware that something needs changing?
Release lower ball joint, release cv joint, and you'e pretty much there.
More stuff can be released to gain easier access (steering rod for example)
When you come to release cv joint bear in mind that circlip pliers would be the easy solution, you WILL struggle without them. The circlip needs to be sprung outwards, not squeezed together.

Darrell
February 2010