Elusive vibration starting 55 and continuing to highway speeds

[spyro235]

Originally Posted by SlickGT1

It’s your axle CV joints. Time get new/rebuilt front axles. You can double check by grabbing the shaft between the two boots, and wiggling it in every direction. Especially side to side. Any movement or even a clanking noise, yup axles. Just hunted same problem a few months back.

I'll definitely jack it up and check the axles, but I'd be very surprised if it was them. The only thing that DOESN'T vibrate is the steering wheel!