Seems like a lot of people are having power steering problems. When it got cold last year my pump started screaming until the engine warmed up. I replaced it myself and all was fine. Well, this year it got cold and it started leaking and I kept having to put fluid in every third day to stop the howling and stiffness. I have been following the threads and realized I hadn't cleaned the solenoid screen. Today I followed the advice given and pulled it and cleaned it. Then I flushed it. What!!! a dif