Does anyone know how to change the front rotors on a 1998 Ford Expedition 4 X 4? Looks like they should come off but I have not had any luck.

Oh this is easy. Take a 48 oz hammer and just wack it. If that doesn't work, try some liquid wrench first around the hub area.
Micheal Garibay owner-Quality Auto Service est.1994

I back a couple years ago did a wheel bearing/hub assy on my 97 F150 4x4 (same suspension) and the rotors slide right off. What issue are you having? Spray the joint between the hub and the inner diameter of the rotor with penetrating oil maybe?

Thanks I will give it a try

The rotors seem to be rusted on. I am going to soak them in penetrating oil when it stops raining and try again.

Soak them with PB Blaster, best rust pent. I have found then then whack 'em .

Although I did have one that absolutely would not come apart and I just replaced the hub assembly, but that can get expensive.Mike