It depends on how you want to remove that right side axle. If you
remove the entire right axle and housing from the main diff housing,
you will need some anaerobic sealer to reseal the extension housing
back to the main diff housing.
Or, you can do it an easier way. You put the vehicle in 4hi, make
sure it's engaged on the front diff. Then remove the 6 bolts that
hold the right drive axle to the right side diff axle flange. You can
now pull the drive axle down past the flange of the axle that you
are going to remove in order to replace the seal. Next, remove
both stabilizer links so that you can move the stabilizer bar up
and down (you do not have to remove the stab bar from where
it is fastened to the frame).
Next, tap the axle out from the differential, you may need to give
it a fairly firm tap with a hammer to disengage the circlip that
retains in inside the diff. When it's disengaged, you can pull
it right out of the extension housing. You will notice that you
have to turn the axle and lift the stab bar in order to gain the
clearance you need. You will also run into the outer c/v boot
just as you are ready to come out of the extension housing, the
boot is both flexible and tough enough that you can maneuver
the axle over the pleats. Now you can just pop out the seal,
install your new seal and re-assemble.
Do not forget the "put it in 4hi" step. Or you will be taking
the extension housing off. What this does is "capture" the
thrust washer that sits on the end of the shaft inside the diff.
Being in 4hi prevents the washer from falling down inside
the extension housing.
Anyway, good luck. And for anyone else reading this who
has an 03 truck and up....you can't do this on those years.
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