Technical Loud power steering ?

My power steering is the original unit in a 80 front clip and its loud when its starts to get to maximum turned direction both ways .What would cause this a worn out pump or worn out steering box ?I was going to change the pump since thats easier and hope that will solve the problem .Thanks

 

Try flushing the fluid before replacing any hard parts. We fix a lot of late model power steering pump noise by flushing the fluid especially on Ford vehicles (debris and cavitation). Some systems will not fully bleed out without using a vacuum attached to the fill neck.

 

I did drain it fully and add new fluid.Is there a better more intricate way to do it ?

 

Jack the car up and cycle it side to side. If its still noisy I'd replace the pump

 

I did that also and yeas when jacked up its still get loud when gets to the max turn .

 

I bought my rebuild kit from PS Kits

 

Even a microscopic leak at the inlet side of the pump can suck air and you can never bleed it out until you fix the leak.

 

So bottom line is its going to be the pump if anything not the box?

 

You re using "power steering fluid' and not transmission fluid? I lost track of how many cars I flushed tranny fluid out of and replaced it with Genuine GM power steering fluid. This is one place that it is well worth the time, money and effort to go to the dealer's parts counter and buy the real deal GM power steering fluid.

The pumps have a ring, rotor and vanes in them and if the ring gets scored or the plates on each side of the rotor and vanes get scored they will leak some through the scores and be a bit noisy.
If they chatter when you turn there is a chance that the vanes are sticking or the rotor is broken.

About the only noise a box makes is crunch if the recirculating balls got smashed by heavy handed turning without power working. I saw it in a manual box with power assist in a forklift when my neighbors workers were too lazy to add fluid to the power steering and I had to rebuild the box.

 

I did use power steering fluid but just generic brand .Its just grinds as its gets close to max turn.Its close to sound of squealing belt but for sure its not belt .

 

High pitch squealing could be the pressure relief valve in the pump. When you had it jacked up bleeding air out of the system, did you happen to try turning the steering wheel with the engine off? It might be that you have other steering problems and it is taking more force to turn the wheels than your pump is set up to supply

 

I did try turning it with engine off too and it seemed to turn ok .