I have a 06 F350 4x4 and turns fine at idle..but going down the road it's hard to keep straight. And if I turn a little to change lanes the steering wheel does not return. Took it to my loacal dealer and they told me that my steering box was binding and needed to replace for almost $1200.00. Has anyone elese had this problem or heard of somthing like this? Dont want to go and replace the box and still have the same problem!!