DesertRatR

My 2003 Corolla has 60K miles. The transmission was serviced 26 months ago at 48K miles. Its been done fairly regularly (every 2-3 years) since the car was new. The dealer is pushing to do it again. I do live in AZ and the car is driven primarily short drives in town, rarely any distance at high speed. Can anyone make a recommendation for service interval?