Gearing, gearing, gearing.... thats all I have to say.

I'm SAS'd & running 5.14s front and rear with just 33s.. and my auto tranny is pretty happy.

I'm ordering the Calmini crawler gears today though. On the really rough stuff where the tires need to claw up vertical obstacles, the tranny still complains a little. The more gearing you can get, the happier the tranny will be in the long run.

Less torque converter slip = less heat generated = a longer lasting tranny.