I got same problem with my 93 .300se.
last night I went to
http://www.europeantransmissions.com/
to see what it would cost to get a rebuilt one.
I checked out the tech help page and found out the I could fixed this by replacing large intermediate plate and gasket .
I have ordered the parts and will let you know if this will do.
you may want to look into it also.
good luck.