04' FX4 CC LS 3.73
20,000 miles

shudders on morning starts, since bought w/8 miles.
noticed whining noises @ 15,000 miles, thought tires were the culprit( until research through this forum)
whining 50 -75mph when foot on pedal, gone when foot off pedal.

23AUG04 brought into dealer. dealer acknowledge of some compliants from 150 owners. under warranty had car rental.

24AUG04, 1600 hours recv'd call to pick up. they replaced gears,ring and pinion. (rear end repair)

test drove for about 60 miles, test drive.... unable to duplicate any previous problems ..............exception of loss of excess gasoline

 

I had my ring and pinion gears repalced as well, which did rid of the problem. The vibe has come back, and now I am waiting on a drive shaft. I've been waitng since July 16.