Originally Posted by
kevyt
I just drove it 140 miles and I noticed vibration in the floor also. I think the suggestion above is right. I think it is an inner CV. I don't think it is an outer CV because I don't have clicking noises while turning at low speeds.
That would be the first thing I would check. I had the same problem and ran through the same diagnosis as you with the same result. A set of new axles fixed everything up (and by new, I don't mean POS autozone axles).