HHolstein

I have a 2006 RX330 FWD, North American Built (Canada) the complete Power Steering System has been replaced: Pump: 2 Rebuilt-had bad seals 2 Brand New (1 had bad seal & whined) Second installed yesterday, Hoses-New High & Low pressure, Reservoir-New, Rack-Rebuilt. The steering still has a slightly noticeable whine ANY SUGGESTIONS???