I have a 06 FX4 and here lately when I turn slow I can feel a slight vibration/grinding in the steering wheel. I have had the truck almost 2 hears and I don't remember this happening last winter. Has anyone here had this same problem or any ideas why this is happening. I checked the fluid level and it was slightly low (about 1/4 below min), so I added trans fluid (like the manual says) and it is still doing the same. I checked for leaks and there were none, I guess the fluid level was low from the factory. Any help would be appreciated.