Originally Posted by eggman 
Pump should not whine unless it is low on fluid or going bad.
ATF is what Nissan recommends for power steering.Check out your FSM,you will see.
Exactly
Originally Posted by Vector I ran PS fluid (honestly, when I flushed the system the old fluid was *black* so I had no idea it was ATF) in my RallyCross car for a year. That wasn't a lot of total miles, but it was putting the P/S through hell about once a month.
A year later I ruptured a hose during a run, and when I replaced it I flushed and switch back to the ATF it should have had. Ran it for three more years of competition with zero ill effects. Planning on dropping it into my rally car, as I'm swapping the engines and it would just be more work to swap the P/S pump from one to the other.
Any I rest my case.
I still have leaks caused by running PS fluid instead of ATF when I first got my car 9 years ago
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