Ok - I guess I better get flushed ASAP -- Did you do it or the dealer - I asked he dealer and was quoted $230. SOme machinery they hook up and washes the inside and hen refill with fliud. How often this should be done?
I had mine done at the dealer but Im sure any shop can handle the task. I forget what I paid, but its not cheap, sounds about right on the price. No clue on the interval, I did it cuz my tranny was taking a beating
i think the intervals for "normal" use is about 40k miles........ i did mine when i did the convertors, two times!!! arrgghh!!!
You will probably want to use a dealer. To properly measure the NAG1 fluid level, you need to hook a StarScan (dealer computer) up to the car and read the transmission temp then compare it to the Miller tool dip stick.