That sucks to have to drive in D2 and D4. I remember when I first got this car, the 2nd day the seals in my AT burnt out because I was driving it in D4 instead of D3 going 80+ mph. Thank goodness the dealership thought it was just a default on the car and not of my own doing, because they footed the $3000+ bill for to get the tranny rebuilt. Oopsie!!
But from then on I drive it in D3...except sometimes I do put it in D4 instead but I can tell when my tranny doesn't change out that it's in the wrong gear...such as about 30 mins ago.