Trying to stick to the book on my wife's '09 Veracruz. Took it to the dealership for a trans fluid/filter change at 44,000. Maintenance dept said that they don't change the filter, only the fluid. I think that they know that the trans will last 100,000 miles (powertrain warranty) without much maintenance, but want the car to require expensive maintenance after 100,000. Same dealership will not change the fuel filter (attached to fuel pump in the tank). I grew up being told these were required regular PM. Are they still necessary?