According to the owner's manual service/maintenance guide, automatic transmission fluid, differential oil & transfer case oil should be inspected for leaks at the following intervals:
Transmission fluid/Differential Oil: every 3750 miles Transfer Case oil: every 7500 miles
According to the notes, "if towing a trailer, using a camper or driving on rough/muddy roads, replace fluid/oil every 30,000 miles or 24 months." This is also the replacement interval recommended under the "Premium Maintenance."
Is there a good rule of thumb for changing these fluids during light city/highway driving, or should I just go by the 30k interval?