ball joints upper and lower control arm
Most likely the front squeaking while turning is a brake issue. If this is the case and it is left uncorrected, you could be looking at a very expensive brake job.
ball joints or tie rods
A bad wheel bearing also when turning it sounds worst or straight driving
te alternaor belt may be slipping causing the squeaking as it returns charge to the battery
A ball joint going bad.
Most likely it is low power steering fluid. Check fluid and see if noise goes away.
A bad bearing can cause can the front end of car to make a squeaking noise when turning steering wheel either direction. It can also be caused by bad suspension.
probably not the tire, but the bearings. misalignment can cause vibrations - making all sorts of squeaks.
umm it more than likely is your supsension, shocks or possibly even your tires itself GOODLUCK!
could be the power steering belt, axle going bad. power steering pump it self could also be bad.
The squeaking is caused by friction between two objects that only contact each other during the turning motion of the car - in this case, in the leftward direction. This is an easy fix - stop doing it.
If your expedition is a 4wd have the front CV joints checked. The 4WD models have auto 4WD that sometimes lock into position and don't unlock ~ even when you don't 4WD. This have very negative effects on the front wheels when turning (especially at lower speeds on 4WD high).