Possible rear-end issues

[Grabber]

This started yesterday. After I got off the highway exit to head home, I noticed that each time I tried to accelarate, the car didn't want to move. So, I gave it some gas, and my rear end (as far as I can tell) started to bounce like crazy. The car wouldn't really move, and it felt like I was constantly spinning, even going half throttle.

I also noticed after letting the shifter go, the shifter was ready to pop out of the gear, and my shaker was going side to side like crazy @ barely half throttle.

This happens in any gear, and the car just spins in the rear even in 3rd gear @ 40. Streets are dry, it was over 40 degrees out yesterday, so that rulles weather conditions out. Taking the car in for warranty work today @ Ford.

Just wanted to see if any of you have had this problem, or know what it may be.

No noise coming from the rear on, no wobbling, no leaks, etc.

Thank you for any help everyone!

-Chris