def the strut holding it up which means that it doesnt work which means it doesnt damper the road vibrations....bilstein might warranty them idk but look for leaks around them or something but thats def a prob! specially if it does it with weight on it...im curious if there too stiffer for your car too but still should go down with that much weight

 

Yeah. .. passenger side goes down fine. . Just the front drivers side does that

 

Just ordered the bilstein HD struts at lethal but they are backordered 2weeks so I switched to the roush struts. Any feedback on the roush struts? I found out the springs on my car are the eibqck pro kit springs

 

Ok so update: I have installed ball joints, sway bar endlinks, tokico shocks and struts, new tires all around, and the front tires balanced twice and also replaced the hub/bearing assembly.. Car still shakes at 55+mph.. It definetly feels like its in the front drivers side or under the middle of the car and there is a slight hum.. Only.thing.i can think of is one of the driveshaft joints or the driveshaft itself... should you.be able to rotate the driveshaft slightly when its parked? I guess im going to have to go pay ford $100 for a diagnostic... Any last suggestions before I do