06 f150 I have a box shake @52/58 mph any suggestions

 

Get your tires balanced and checked for out of round.

 

Buy a car? They don't have that issue. Or stop staring in the rear view mirror...

 

covered many times. its the location of the rear shock. perfectly normal

 

Is there a fix to make it stop?

 

on the models after the 04 ford tried placing some type of material back there. its either on top of the lift block or on the frame, i cant remember. it will look pretty obvious if you have it. i dont on my 04 but never bothered getting it as the shake still seemed to occur in the later models. if i can ill try and find you the thread with more info and pics

 

https://www.f150online.com/forums/20...cks-shake.html

https://www.f150online.com/forums/20...-mph-help.html

https://www.f150online.com/forums/20...ed-shakes.html

https://www.f150online.com/forums/20...ke-60-mph.html

no pics but basically each threads reaches the same conclusion. hope this helps