Recently bought a 2004 4x4 FFR for my weekender and something to flip (take it literal). Looked around for forums to get ideas for upgrades and this one popped up. I see there are pretty old posts and not sure what I'll really get for feedback.
Doesn't sound like you figured it out so here it is.
I had my 04 edge in the shop for a tune up and shocks, and I was told the vibration was from my 2 pc driveshaft. but thats in the 4x4. Sounds like definite bearings. Did you get it fixed?