It appears that the industry assumes that 20,000 full [1>2>3>4 and 4>3>2>1 ] AT cycles simulates 100,000 miles of driving and this is the standard set for transmission life.
http://www.lubegard.com/automo....html
Interesting graph on stift time variablity new and oldhttp://www.swri.edu/4org/d08/Abstracts/blueatf ... ectran.htm