I have a 1968 Mustang Shelby that has a p/s shake when you turn it to the right or the left. The steering wheel chatters when you turn it either way.We replaced the contol valve and the slave arm and it still does it. We the put on a used control valve and the shake went away, but then it was hard to turn it one way. We put on another new control valve on, and this one shook also. I have put on a new p/s pump and we are running type F fluid on it. I adjusted the control valve spring nut to 100" lbs and the turned it back 90 deg. I also made sure that the drag link that screws into the control valve was adjusted at the right length. If any one has any ideas let me know ,
Thanks,
Steve
