My personal theory at that mileage is to drain and change filter..If the
fluid you drain out is very dirty with metal particles in it..Bewar4e..Its
soon time for a rebuild (I don't do automatic).
I have been told that the new fluid will tend to eat old clutch plates if
the trans has very high mileage on it.. 150K plus I have been told by
some..Others say change it and drive it till it goes..
Sounds like a crap shoot to me, but I tend to change and see.
On my newer Ferd rigs..It gets changed initially at 60K  and without fail
every 30K after that....oil every 3K..coolant every 30K..get the picture??
Preventative maint. is key..
Do your Vanagon manual trannies every 2 yrs or 30K MAX
YMMV of course
Daryl of AA Transaxle
425-788-4070
"On the cutting edge of Old technology"

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Kevin Gilbert
Sent: Thursday, January 28, 2010 7:43 PM
To: vanagon@GERRY.VANAGON.COM
Subject: My AT is fine, but...

Vanagoners,

I'm curious for your recommendations.

My '84 Westfalia automatic transmission runs just fine. The van has
114k original miles, and has had very little transmission maintenance,
save for an occasional topping off of fluid.

Should I leave well enough alone, r/r filter and fluid, or have the
thing power flushed?

Thanks.
kevin