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Per owners manual...................

Change automatic transmission fluid and filter (severe service). (*)Every 50,000 miles
Change automatic transmission fluid and filter (normal service). Every 100,000 miles

(*) Change automatic transmission fluid and filter if the vehicle Gross Vehicle Weight Rating (GVWR) is
over 8600 lbs or if the vehicle is mainly driven under one or more of these conditions:
− In heavy city traffic where the outside temperature regularly reaches 90°F (32°C) or higher.
− In hilly or mountainous terrain.
− When doing frequent trailer towing.
− Uses such as found in taxi, police or delivery service.
 
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