Jim Grant's Tech Tips
'99 Ford Explorer, Rear Axle Noise
Q:
My '99 Ford Explorer
Sport has a howling noise (at about 40 to 45 mph). I have approximately
33K miles on the vehicle. The Dealer said it was "normal," but
I seem to notice it getting a bit more noticeable. Any suggestions?
A:
No, I don't think howling
is a normal state for a Ford Explorer. Especially if the noise is becoming
more pronounced. Start with basics first and inspect the tires. Be sure
the tire pressure is correctly set. As a guide, use the tire manufacturer's
cold pressure rating, which is on the side of each tire. Tire cupping
is a common event on these vehicles. If a tire is cupped it will be louder
and can make a noise that would make one think that there is a bearing
problem. Then rotate the tires and test drive the vehicle. If the noise
moves then you know it is a tire problem and the rest of your vehicle
is just fine. If the howl remains unchanged then there may be the start
of a problem that will require closer inspection.
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