It sounds like you are saying you need to replace the drive axle. Curious, what condition is the drive axle currently in that you feel necessitates a replacement?
That said, the first thing you need to do is purchase a repair manual for your model. I personally like Haynes, and they describe the process step by step.
From my personal point of view, I can give you a few tips on doing the job...
1) The first and perhaps most difficult part of replacing a drive axle is removing the hub nut. It is on VERY tight. I typically spray on penetrating fluid for about two days prior to doing the job. Also get yourself a large cotter pin to replace the one from the old drive axle. Aftermarkets usually only provide a new nut, not a pin.
2) Get yourself a breaker bar, and a hub socket (I think its either 30 or 32 millimeters.) Get yourself a long pipe wide enough to slide over the breaker bar and pull like the dickens. You'll hear when the bolt breaks loose. Don't remove the axle nut just yet.
3) Loosen the wheel lug nuts, and jack the car up. Place it on jack stands! Chock the rear wheels. Place the transmission in Park and pull the emergency brake (if you haven't already!)
4) Once the wheel is removed, you will need to remove the two bolts and one nut that hold the ball joint to the lower control arm. Get yourself a pry bar or large screw driver and pry the steering knuckle away from the control arm. You will now be able to manipulate the strut/steering knuck assembly.
5) Back the axle nut completely off the axle. Give the axle a light tap witha rubber or plastic mallet until it moves slightly into the hub. Swing the strut/knuckle assembly away from the drive axle so its comes complete out of the hub.
6) You will need to get under the car with a large screw driver or pry bar and pry the drive axle out of the differential housing. Be careful here where you pry. You may need to wack the prybar with a hammer to break it loose.
7) Once the drive axle is out, you make want to consider replacing the seal that is seated inside the differential.. It pries out with a screw driver and you can drive it in with a large socket, pipe, or..er...mag light
8) Installation is reverse of removal. Make sure you torque everything down to specifications! Another note: Make sure the drive alxe is securely driven into the differential. I like to tap it on the inner bearing housing so the clip is without a doubt secured. There are several grooves that are designed for this purpose. You won't damage anything by doing this. Also, before inserting the alxe into the hub, coat the spines with some all purpose, high temperature grease.
Good luck. If you don't feel comfortable with the job, price it out with some mechanics - but buy the drive axle first!
axle assembly removal
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