Okay, I'm working on my '66 Westy which hasn't been driven in 13 years.
I'm replacing the axle boots because they're crumbly and one is actually
leaking oil.  I have both of the new boots and I'm wondering if I should
drain the oil completely and then refill the tranny with new oil.  My
manual says to use SAE 90 hypoid oil.  First of all, is this something I
can get at my FLAPS? and secondly, can I refill it myself?  The engine is
out right now so I can probably get to the fill plug from above.  All of
the pictures I've ever seen about this have a funky filler pipe thingy
that looks very professional (i.e. VW extra-super-duper-once-in-a-lifetime
tool #whatever).
A somewhat related question: I need an automatic transmission dipstick and
tube for a '73 bus.  Somehow, mine was lost in my mother's garage.  Does
anybody have one they don't need?

Thanks in advance
-Erik