Vibration at 70mph

[PMJJ]

Just wondering if any of you guys use the poly bushings on your cars, vs the stock rubber and have had any vibration issues after you changed them?

 

[SleeperMark]

I've been chasing a vibration issue. Also, let me know if you figure it out because I was looking at buying these, but ill hold off if they're causing more vibration.

 

[chris2523]

it probably just makes driveshaft vibrations worse.

 

[FordPro]

I've been chasing a vibration issue. Also, let me know if you figure it out because I was looking at buying these, but ill hold off if they're causing more vibration.

Just to confirm, these are vibrations from the unibody under you while driving, or the steering wheel or what. 70 is when unbalanced wheels and driveshafts peek out their ugly faces.