We have taken several long trips lately and i have been noticing that at high speeds the expedition feels rally loose. Any sudden wind burst and i feel the expedition move really easy. If i pass a semi truck. I can feel the sudden burst of air as soon as i clear it. If i hit a small bump on the highway. I feel like i am going to fish tail out of control. Is it just the od the expedition thays causing this? Or is tjere something wrong?
Check the upper control arms as well. I took a 3,000 mile trip this summer with my '07 that had only 45,000 miles at the time. I did not feel any issues, as I guess I was used to it, but when 2 other family members took turns at the wheel, they observed that the vehicle was "steering funny". The 3rd row passengers almost got sick from the constant moving back and forth from one of the drivers. I took it in to get the tie-rods checked (I live in MN, we have ALOT of frost heaves that cause issues with alignment), and it turned out the drivers side control arm was shot. I replaced both arms myself with MOOG units that have grease zerks. The stock Ford arms do not. The new arms solved my issues, and it is back to handling like new.