Hello fellow bimmer fans,

I jsut recently bought a 89 535i 5spd, and the power steering is very notchy, as if the PS is cutting in and out which makes it worse than if it was disabled. Imagine taking a hard turn and all of a sudden someone yanks the wheel.. thats exactly what it feels like. The car has 175k, about 30k ago, the PS hose from the pump to the gearbox and the hose from the gearbox to the cooler were replaced and ATF added (dont think it was flushed, per se).
I drained the fluid today, completely clean ATF, nice red color with no bits in it.

Is there an actual bleeding procedure for the system or just trunt he wheel left and hold for 5 seconds, right, repeat?
I plan on using a dexron III spec ATF, is that fine?

which is more likely the culprit here, the PS pump or gear box.. can either be rebuilt from other parts?

Any and all advice is muc h appreciated. I did search and went through the factory manual, but found nothing of subtance.

thank you!!