Proper fluid for 1971 power steering pump

Last year I replaced my power steering pump with a rebuilt one from Autozone, all was well for a while but now this one is starting to make a similar whining noise as the one I replaced. The belt is new and tight, plus the fluid level is full.

I may have messed up because I put power steering fluid in the replacement one, but I was reading on another thread someone said transmission fluid should be used instead?

I have a newer style pump on mine because I went with a fuel injected 5.0, dont feel bad mine whines too and isnt very old haha

I always use type F. It will whine just a little when turning the wheel when idling. That's normal, but if I was to use off the shelf PS fluid, it will whine a bit more.

Jim, use Type F ATF

Jim, if your running the original PS pump, then as Don said, run type F fluid. Ford actually has a part number for a 12oz long neck plastic bottle of PS fluid. But it was more of a matter of convenience since it was still just F fluid in resealable easy to pour bottle. Look for requirement ESW-M2C33-F on the pump dip stick as that is the requirement for F fluid. The PS pump whine is just about standard on these style pumps as most of my vehicles that had PS had the "Whine"!

Agree with OMS uses type F!!

I had to go to a couple parts houses to find it and no whining observed.

Then my wife came home..ugg

Paul

Type F... For 38 years, never had a problem...

I have been using motorcraft type F for a long time.

John J

Note: this picture is from Australia, where fluid containers are stored upside down.

No PS pump whine here, due to not having PS. heh It's fun wrestling a 429 c.i. bear at slow speeds, builds character.

Thanks guys, I'll drain it and try the Type F ATF fluid to see if that helps.