I am thinking about giving my 5AT Coupe a Transmission Flush. I made a few calls to both the infiniti dealers and nissan dealers within 30 mils from NYC and got quotes from $170~$280. I also received quotes for drain and fill for about $80~$120. What triggered me to write this thread is one of the nissan dealer told me that they don't recommend doing a flush for this transmission although they can do it for me if I want to. They said it only need a drain and fill. Another dealer told me that they use a different fluid to flush, drain it and then fill it with the Infiniti recommend J-matic fluid.

So my questions are:

1. Should we flush our tranny?

2. If so, should they use J-matic to flush? Or a general question is if a different fluid is used for flush than fill.

3. did anyone near NYC did a flush or fluid change for your 5AT? how much and which dealer do you recommend?