I have a 2000 E.B. Expedition, with air sus. The truck pulls to the left hard if i'm driving over 60 mph. I brought it to the dealer, they said it need an alinment. They did that, but it stills does the same thing. Any help on this would be good, i want to tell them to check it out again.

 

Check the TSB's. There are a couple on pulling that have to do with the tires. May be a long shot but who knows....