Just bought a 2001 F-250 7.3L diesel and while driving it home from Pennsylvania, I noticed difficulty keeping the truck in the lane especially while passing a big Rig. My F250 seems to have some sway or wandering to it at 55-70mph and is less evident at lower speeds but its still there. I'm not sure what the condition of the front end is. I did not get any maintenance records with it. It only has 107K miles on it but is a 01' Where do I start looking?