Now I understand. It's all time 4wd. Are there any sounds associated with this other than when you turn? It may have something to do with a CV joint. I would check that to make sure they are tight and not loose. If they are bad enough, they could make a knocking when turning. Also, have you checked steering components such as ball joints? And finally, have you checked for a bad wheel bearing?
I just reread your original posting. Start with the CV joints. I think the problem may be there.
Let me know what you find.
Monday, October 5th, 2009 AT 8:56 PM