[pdxmotorhead]

I would definately pop the cover, just to wipe it out and inspect the unit.
DO NOT USE SOLVENT OR ANY CLEANERS INSIDE, just wipe out
with clean shop rags. You can use a little clean lube to assist on stubborn
deposits, or use a rag soaked in break clean to work small spots out.
Too much cleaner will ruin the lube when you put it back together.

Refill with quality synthetic. (DOn't overfill it will trash the axle seals.)

Only use air tools for taking things apart. Torque everything else
with a decent torque wrench when re-assembling.

Use the right wrenches for the hex heads on the CV's its WORTH
the bucks to buy a set. (the bolts can cost more than the wrenches....)

Look before you remove, often service manuals require steps
you don't need, they assume you have a lift and lots of other tools.

You might consider replacing the flex joint in the drive shaft while
your in there, Unless the existing one is perfect. No cracks and
not brittle feeling.

Good Luck
Dave