This is a strange one. I had my pump rebuilt in my 64 by a local rebuilding company, all they do is steering pumps, gears and brake boosters they have been around for 40 years and they have done work for me before. I got it back and went through the normal bleeding procedure. I had my 6 year old turn the wheel back and forth while I put fluid in for ten minutes to make sure the air was out before I started it up. Never made a noise no "milkshake" fluid or anything like that. Went for a test drive and I hear power steering pump whine after its warmed up only when turning at rpm, while i'm driving down the road I can hear it just going thorough normal curves in the road. Hot or cold at idle it's silent and it works great all of the time. No leaks except out of the cap since of course its overfilled. I looked at the diagram in the manual and its pretty basic I don't know what would be making the whining noise as I thought that was always from air. Can these take forever to bleed and some air bubble is buried in the system? If anyone has ideas let me know. I'm about to swap it for another pump I have that worked when I took it off an other car and see what happens.
Thanks, Nick