what's in my trans pan?

[Schuyler Wrobel <schuyler62@xxxxxxxxxxxxx>]

...while I'm doing stuff under the car I decided to replace the trans 
pan gasket and filter
for the Torqueflite 727, it's leaking also. So after draining the 
tranny fluid and pulling the
pan I see a thin layer of grey sludge covering the bottom of the pan? I 
don't remember
seeing this stuff before? Is this from using Mobil 1 synthetic trans 
fluid? or is something
bad happening here? The tranny seems to work fine although it could 
always be better.
any Ideas or is this normal for an old Torqueflite?
thanks for any help here,
Schuyler
Schuyler 62 Dodge Dart 440 wagon w/ Poly 318
 <http://www.1962to1965mopar.ornocar.org/ml-wrobel62.html>