I recently decided to replace the transmission fluid in my 1982 Westfalia
diesel 1.6.  I decided to try the Amsoil and at the last minute added Motor
Up transmission additive as well.  The result was that the shifter moved
smoothly until you tried to push it into gear which was very difficult and
made an awful clunk.  I immediately drained the fluid and replaced with
standard VW spec. fluid and all was well.  Anyone had similar experiences?

David