weird Power Steering Problem

[Driven08]

So when the car is cold the steering is a little hard but when I drive for a little it turns well up until you try to get it to full lock.

Turning more than 1 whole rotation seems as if the power steering isn't there and it also has kinks in it(goes soft then hard and soft and hard)

I have bled the system like 3 times and tried 2 different power steering pumps and it still the same problem.The rack doesn't seem to be leaking though either but I'm just going to replace it.

Suggestions?

[DRIFTING_SIL_EIGHTY]

What fluid are you using ?

[Driven08]

ATF Fluid...........

[Driven08]

Ok changed the steering rack and pinion and it still gets hard when your start to go towards full lock. As if I only have partial power steering