steering pump growl pls. help Options

[amurph01]

hello,
My 95 celica GTs steering pump was/is growling pretty bad so I put in a new pump. It's still howling though!

I bled the system ..alot
I flushed the system
the fluid is Mobile 1 sythetic Dexron.

please, any input on what could be causeing the problem would help.

could the rack cause the pump to growl? a bad hose?

thanks,
Andrew