Your R&P is probably leaking based upon your observations, but it is probably not the cause of your passenger side noise and the steering wheel vibration. A remote possibility is that you are so low on PS fluid, that you are feeling intermittent power steering in the system. Your strut mount or a spring on that side may have broke, causing the alignment to go out. Of course it could be many other combined or uncombined things as well that are unrelated such as a wheel weight falling off, a broken suspension linkage, broken wheel stud, shot wheel bearing, shot outer tie rod, broken/distorted/delaminated radial belt in the tire, intermediate shaft bearing failure, etc. etc etc.
davemc
davemc