So I have noticed that when traveling around 70mph sometime I will get a shaking from the car from under my feet as you can only slightly feel it in the steering wheel. It also is not coming from the petals but is most noticable from the floor. I replaced the outer ball joints as one was starting to get a hair loose thought this would do it but nope.. Anything I can look for or wiggle to see what needs to be replaced.

its going on 16 years so Im guessing a bushing of some kind but maybe Im wrong... getting tires balanced again free as its that time but dont think just that will do it.

Thanks

 

High speed vibrations are usually wheel balance or bent wheels, but have you checked your wheel torques since having them off? Wheels do come loose and can cause a vibration much like an unbalanced wheel.

 

How many miles on your tires? Run Flats?