In article
<1160010910.895752.215280@c28g2000cwb.googlegroups.com>,

There are six bearings in your rear axle;
Two pinion bearings (they support the pinion gear)
Two carrier side bearings (they support the differential carrier)
Two axle bearings (they provide support for the outboard ends of
the drive axles.

I have no idea what they are referring to by "rear side",
probably the carrier bearings.

If you want to do the job yourself, first you need to ascertain
whether you have the necessary tools and equipment or can find a
shop willing to do the bearing R & R.  You'll need;
Basic sockets, wrenches, pry bars.
Inch-pound torque wrench (beam or dial style)
Dial indicator
Side bearing adjuster tool
Bearing splitter
Shop press
Pinion yoke holding tool
1/2 inch drive torque wrench
Proper service instructions (if your Haines manual can't ID a
pinion bearing, I'd guess it won't be much help here)

Whether or not it's a job for you, all I can suggest is to locate
and read thru all the bearing replacement procedure and decide
whether you think you can do it.  Naturally, if you do the job
with the axle housing in place, you'll wish you were born with
three arms/hands.

Lastly, the longer you drive on failing bearings, the more
contaminated the usable parts (ring and pinion) will become.
IOWs, you risk totally trashing that which may now be re-usable,  
adding to the repair costs and possibly taking the job to a level
where you will have to farm it out to a professional.