At around 1,000 miles I started hearing a slight whine coming from the rear-end of my Explorer. At first I ignored it but, as a few more miles were added to the odometer, the noise increased in intensity. The car now has 5,000 miles on it and the whine is louder by a lot. It's only noticeable when the car is in positive torque. When you let off the gas the noise stops.

I visited the dealer and they confirmed the noise. The next thing they told me was they didn't have a repair for it! I contacted Ford customer service and they told me the same thing. They also said that their engineering department was working on identifying the noise and how to go about fixing it. They hoped to have a procedure for fixing it sometime in the future. My response was, 'Ford has been building cars for 100 years and you're telling me they don't know how to fix this problem??' Answer: yes

Needless to say, I am not happy with Ford motor company! I guess the only option left me is to keep after them.

The problem has to do with the rear differential of the Explorer. The noise is a slipping sound in the rear of the vehicle during a take off from a stopped position. /mostly happens when turning from a start. 2 friends of mine had purchased their explorers around the same time and one had to have his rear differential repaired at around 20,000. The other friend has about 29,000 on his and has the same identical symptoms. He thinks it is a gear in the rear end.

Not sure if this is a problem with most of the Explorers but it is quite a coincidence that 2 close friends, purchasing the same vehicle around the same time, around the same mileage, are having similar problems.

Have scheduled an appointment to take out to dealer to get serviced next week.