Differential Unit problems of the 2002 Ford Explorer Sport

I just purchased a used 2002 Ford Explorer Sport on 08/06/2011 so that I had a vehicle that I could take the kids on camping trips. On 09/04/2011 on our way to daytona beach I noticed the car was pushing and swerving in both directions, I had just put brand new tires on it and replaced both the upper control arms and all 4 ball joints and had an alignment done, I thought that it's a bigger vehicle than what I'm used to and had been a slightly windy. On the way home on Monday 09/05/2011 it was even worse, I could feel the body rolling the car pushing ect. . I pulled over and checked the front suspension. There appeared to be nothing wrong. I crawled home a nervous wreck. When we unlaode the car at home I noticed the car was sagging in the left rear. I crawled under the vechile. I noticed 2 big issuses, 1st the coil spring is broken were lucky it didn't pop out and shred a tire, and 2nd all of the body mount bushings are completely crumbling or just plain gone. Talk about dangerous. I went online and there seems to be thousands of complaints for the 2002 explorers on blogs and Ford forums and tons of sites for complaints for automobiles for all models of this vehicle for the exact same things. I have also seen numerous other complaints on this vehicle for other equipment failures one of them being a whining noise coming from the rearend of the car which I thought was the tires, but apparently it is an improperly engineered differential that Ford will not fix or admit that there is a problem with although there are a couple of technical bulletins out on it. They are just lucky that my children were not injured. How dare they not accept any responsibility to take care of these vehicles that they engineered and sold, used or not. If you manufacture an unsafe vechile and a defective vechile you shold be responsible. Is it gonna take a father and his children being killed.

The rear end was leaking fluid on several occassions, had the rear differentail seal replaced two times, which did not fix the problem. Eventually the rear end had to be replaced. Rear end now shutters and shakes less then 10,000 miles after it was replaced.

In August 2003, reported to dealer that the truck was groaning when turning. Service advised that I was turning the wheel too far and rubbing the tires on the wheel wells. This was not possible since the tires were the original factory installs. By November, the truck would hardly turn without dragging the back tires and the dealer found there was no fluid in the rear differential requiring a complete overhaul. Then, in June 2004, the "new" seals failed allowing the fluid to, again, drain out. Dealer is currently repairing.