I recently purchased a 2004 Nissan Frontier Pickup. Although it is 16 years old the truck has only 78000 miles on it and it likely has never had the transmission fluid changed. I have often read/heard people say that you should not do an ATF fluid change on a vehicle if the fluid has gone a long period without being changed. I would like to hear from persons who might have personal experience with this issue or from mechanics who have dealt with this.