Hi, 2nd time you posted on this I think..........
On the filter screen - No.
On the rubber pan gasket,. Basically no.
It's a rubber seal designed to wrap around the edge of the pan and get
pushed into a grove in the transmission body, and they're hard to get really
in where they belong sometimes. 
And you wouldn't normally use a sealant.
Just do extra clean careful work.
Scott
www.turbovans.com 

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Michael Sullivan
Sent: Tuesday, February 05, 2008 1:27 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Trans Filter

Should be getting my trans filter kit from Bus Depot any day and wanted to
know if any sealant is needed on either the filter or pan gasket. Thanks,
Micael
  91GL Auto 'Gringo'

Thanks, Michael Sullivan