2002 Mercury Mountaineer AWD 4dr SUV (4.0L 6cyl 5A)
Driving from SLC to Colorado, broke down - rear differential, tried again, broke down half way - front differential. Supposedly fixed, didn't feel right so I got it home took it into Mercury, they said both front and rear differentials were "fried". Took it apart, correct gear ratio. They don't know why it has been destroyed in 400 miles. Already paid around 3k, they say this repair will be 5-6k. Trying to fight with previous place that did repair, but appears to be a problem with the design of the drive train!! Do not buy one of these. Pure nightmare.