When to drain and fill auto transmission?
 

Hello. I have a 2003 mazda protege dx with the 2.0 engine. It currently has 33000 miles on it and I cannot find anything in the manual on when I should replace the auto tranny fluid?

READ: Flush it or Forget it | MotorWeek
"should flush it every twenty-four to thirty thousand miles"
and: How often should the automatic transmission fluid... — Yahoo! Autos