i know just recently on my escape i had a terrible vibration when driving but it only happened between 20-30 khm ...... all the universals were checked and all seemed to be working fine but they were wrong, it wasn't untill the universal was actually removed that we found 1 of spinning points of the universal was actually seized and not moving period. once a new universal was replaced the vibe stopped, also noticed that a factory weight had been lost but noticed that it didnt even matter after the universal was replaced since it has no vibe at all now.
2000 F150 SUPERCAB FLARESIDE 4X4 5.4L
EDDIE BAUER EDTION EXPEDITION 4X4 5.4L
2003 FORD ESCAPE XLT 4X4
NEW! F-250 Super Duty 4x4 Xlt Sc