I have a 2007 Nissan Frontier with the VQ40 V-6 and the auto trans. Currently have only 17,800 miles on the truck. It gets some long distance trips but in between, lots of short around the town type of driving. It is factory filled with Nissan matic J and calls for that as a replacement. I'd like the boards thoughts on the following: 1. When would you recommend the first trans service? 2. What type of service...flush or pan drop/filter? I plan to have thios done at the dealer, BTW. 3. Should I use Nissan Matic J or the new syn Nissan Matic S?