Todays
computerized transmissions can actually cost more than the vehicles
engine. Like the engine the only thing that keeps it from burning up do
to friction is its fluid. The fluid in an automatic transmission serves
a dual purpose. It is the hydraulic fluid that actually drives or
operates the transmission as well as cooling and lubricating it. A
periodic flush with all new fluid and filter change every other time
will help insure longevity and peace of mind. Most vehicles are
recommended at 30,000 miles but check your owners manual for exact
service interval