Real common for the wheel bearing to make a noise like an airplane engine. The problem is on vehicles with bolt-on style hub assemblies, it is impossible to tell which one is noisy. It can sound like the noise is coming from the right side and still be the left one that is bad. The good news is if you replace the wrong one you can put the old one on the other side.
To tell or sure which one is noisy, raise the truck so all four tires are off the ground, then run it in gear and 4wd. Listen next to each bearing with a stethoscope. You'll be able to tell the difference between the one that sounds a little noisy and the other one that is REALLY noisy.
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Sunday, February 6th, 2011 AT 10:20 PM