we have alot of problems with the lincoln LS and the aviators and all we do is perform a power steering flush, drain the flui of the pump, resoirvoir and rack, then refill with FORD Mercon v trans fluid then leave some space to add 1 bottle of friction modifier to the system and that should take care of it. nothing should be damaged. that's all you would need to take care of it. that's the way i have taken care of other vehicles with the same problem.