UPDATE:
As you may have noticed in another thread under WHEEL BEARING HOWL, I had the other three bearings replaced. No change. So, four new wheel bearings in 500 miles. No change.
Today, I went back to Firestone and they broke down all of the tires and rims and road forced them again. Very low numbers in the front - 4 and 7. Rear was 11 and 17.
When done, they put the car on the rack with someone inside. They drove it to 65mph and the wheels looked perfectly smooth. Inspected the front axles, no play and they rotated smoothly.
Looked at the drivers rear axle and BAM!! It's hoping up and down as it rotates. The passengers rear is, too, but half as much as the drivers side rear - but, also more than the front. Quite a bit of movement in that rear drivers axle - more than this video (below) can capture. It, obviously, connects to the diff. Put your hand on the diff and it's hot and shaking quite a bit. You can actually see it shaking. Look up through the drive shaft and you can see the rubber bushing shaking.
I drove home and it's generally smooth at all speeds but 60mph. It still wobbles at that speed - 58-62mph now. I say "generally" because I now notice it in the seats and I suspect that's the axle being bent.
The way harmonics work, I wonder if it's possible for that bent axle to move the shake up the driveline and have it come out in the steering wheel?
http://vidmg.photobucket.com/albums/v324/shumax/B5A3133B-4CB7-4C04-A577-08640A9E3CB3_zpskbdnf0ab.mp4
I did contact our fleet folks and explained the situation. They put me in touch with the regional service rep. I spoke with him and he is going to contact my dealer and get in touch with me.
Thoughts?
Shumax