Date: Sat, 28 Apr 2007 07:57:17 -0700
From: alancshearer <alancshearer@SBCGLOBAL.NET>

Does anyone know which of the threaded ATF cooler  attachment holes in
the transmission is inlet and which is the outlet? My transmission was
contaminated by coolant, so my idea is to run the engine at idle and
let the transmission expel the contaminated fluid while it sucks up new
fluid. I'm open to suggestions of a better way to get the contaminated
fluid out.
--------------
Alan,
Unconfirmed report says: the lower hole is the out-put, upper hole
input back to the AT.
Please let us know what you find-out and can confirm.

Your plan for flushing is standard procedure for flushing lines and AT
Rad-Coolers in conventional vehicles. Ought to work in a Vanagon but
with the following issue or limitation.
 From what limited information I know about the 090-AT, the ATF
circulation to and from the TQ is not significant. The TQ is
pressurized with ATF through the small hole in the center of the
Turbine-Shaft from the pump. Return ATF is by... I donno! Someone in
the know please chime in here?

Without further information, one sure way to flush the TQ is to remove
it and flush it out on the bench. This requires removing the whole AT &
Diff though. A well equipped Transmission Shop will have a vacuum
set-up that will suck all the ATF out of the transmission and TQ, while
still mounted in the vehicle.

I would consult with a transmission technician. The damage to the
internal seals/clutch-packs may have already been done. At this point,
no harm in your flushing idea though, short of your time and many
quarts of ATF. Run a bottle of SeaFoam AT Cleaner through it, refill
and drive it..... see what happens......

Phil Z.
Campbell River, BC