FORD F-150 STEERING SYMPTOM

1989 Ford F150 V8 Four Wheel Drive Automatic I Own A 89 Ford F150 Some Times It Works In 4 High And 2 Wheel And Some Times It Ackts...

I Have A 2000 Sel Ford Windstar With 151500km, S And Have A Power Steering Problem. When Turning There Is A Constant Squealing Or Screeching...