Postby smj999smj » Thu Jul 27, 2017 10:42 am
The part # you gave has too many digits for a Nissan part #. You probably have "21460-9CA2E." This would be a replacement radiator in a 2006; the original radiator was likely a 21460-EA215. It seems the cooler issue was fixed sometime under this part #, but there have been a few reported failures with radiators that have this # so it makes it hard to say whether you can rest easy or not.
As far as the fluid, that's typical for NissanMatic Type "J" or "S" ATF. While it pours out of the bottle a dark red color, it usually looks an almost gray color when you check it or drain it for service. As long as it doesn't show any signs streaks of white or strawberry colored custard, you're good. Those that service their trans fluid with Valvoline Maxlife full-synthetic ATF grdually see the fluid turning to a more conventional red ATF color, usually after the second service.