How many miles are you going between oil change/services? The maintenance minder will take into account how the car is driven... highway vs city miles, long vs short trips, type of driving (aggressive vs passive), etc. to determine when the fluid needs changing. Even though your car is only 3 years old it does have almost 45k on it which is getting close to the maximum of when IMO transmission fluid should be changed (60k). With you having 80% left before next service will be due you may well be close to 60k when it's time to have it done.