I have a real bad shake 40 mph and higher
i have replaced rack ,all ball joints and tie rods

any help please post

 

Check the tires...could have a broken belt...

 

Is there anymore information you could give us? Such as does it get worse at a certain RPM, overdrive on or off, in curves, etc. Since you didn't mention a check engine light, I'd start by checking to see if you've thrown a tire weight, or u-joints for play.

 

I had the same issue at high speeds. Turned out my emergency brake was sticking... Ford rebuilt the ebrake assembly under warrenty.

 

sounds like a broken belt in the tire like techrep said

 

Well here we go have changed the whole front end every single last pease so i get on the rode and it is still shaking starting to think of buying new tires but dont want to spend the money for nothing

 

Take it in to a tire shop and have them check the balancing and condition of the tires. Have you locked up the brakes at all? That would give you a flat spot. Do you feel it in the steering wheel or is it coming from the rear end? Check your shock mounts as well. Have you changed out the hub assembly in front? If the bearings are shot it will shake. What about your lug nuts? Are they tight? Are they seated correctly? Are they the right style lug nuts? Need more info buddy

 

Thers not mud or snow or something on the backside of ur rims r there.

 

Have had tires road force balanced changed both front hub assemblys changed all front conponets and checked e brake and u joints still shaking in the steering so bad the cd player starts skiping

 

Is your truck 4x4? It almost sounds like maybe your 4 wheel drive is maybe partial engaged.