Are you sure it is the transmission oil cooler, not the engine oil cooler?
That one fills the coolant system real fast. Due to space advantages and
efficiency water cooled transmission coolers are much more common in cars.
Even my motorhome with the Cat C7 engine and Allison MH3000 transmission
uses a big oil to water heat exchanger.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
HotelWestfalia
Sent: Wednesday, April 04, 2012 2:43 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Trans fluid in coolant system

Hi to all,

This is a first to me.  The transmission cooler has failed, thus releasing a
lot of oil into the cooling system.  Now I'm not sure how to rinse the whole
system to get rid of the oil.  If detergent to be used, what kind and how
much to a gallon of water.

Also I was real surprised how expensive a new cooler cost, between 530 and
300 dollars.  I would think an external radiator type cooler would be
cheaper and better for the purpose, as is used on other cars.

Zoltan