This 99 Ranger of mine has a loud whining coming from what I think is the power steering pump. Still works properly, full of fluid just loud and obnoxious no leaks either. Any thoughts? Never been replaced over 200,000 miles

I think its time for a new one. mine did the same thing. oh and would get a motorcraft one, ya more money but worth it.

i would replace the fluid.(Mercon ATF) i use a turkey baster with a hose at the end and suck the pump dry..fill it up drive and do it a few more times.......these pumps are normally a little noisy it is part of the design, however if it is different then it has been you might want to replace. although i am a big proponent of MC parts in some applications i use aftermarket. I put the AZ pump in my truck 2 years ago and it has been fine. I think it cost $23.

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2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).

Where do you pour the power steering into? I cant tend to find it but i think i have an idea of what it is.. on the drivers side in a little containerabout 1.5x5 inches long?

What engine do you have?

On my 4.0 liter sohc, the power steering pump is at the left (driver's) side, front of the engine, with a pulley that the serpentine belt goes around, with a plastic reservoir, with a cap marked "Power Steering Fluid".

Can't speak with certainty for other engines

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That 1 1/2 by 5 iinch container, if it's oval, may well be the master cylinder reservoir - that takes brake fluid - don't go putting anything but brake fluid in that one . . .

But I think that cap is marked "Brake Fluid Only" . . .

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2003 Supercab Flareside
4 liter V6
4x4 FX4 Level I
5 speed Auto
4.10 LS Rear