My 2005 Subaru Forrster some time shudder when turning. Why?

What is your question?

It will shudder at very low speed when turning either going forward or reverse. All the oils have been flushed, that is transmission, both front and rear differential. The problem sometime goes away or sometime it is very noticeable (severe). The problem is not there when going straight at any speed. There are suggestions like this on the web but I am not sure that would fix the problem by changing the turning solenoid. What would this cost? Another noticeable thing is the noise (under the hood in the back. I have new breakpads in the back and I don't get any noise when I apply the breaks) I get sometime when turning which is new.

How long has your 2005 Subaru Forester had this problem?

1 year. noise in the back 2 months