Shop for New Auto Parts at 1AAuto.com http://1aau.to/c/84/dr/axles-and-axleshafts If you hear a humming noise from the rear of your truck, it's probably one of two things. Either the differential has a problem, or the axle shaft bearings are worn out. In this video, Len shows you where to look in the rear of your truck to find out where that humming noise is coming from, and shows you what you can do to fix it. 0:00 Humming Noise From the Rear of Your Truck? Replace the Axle Bearing Before It Starts Grinding
0:30 Listen For the Humming or Clunking Noise With a Passenger
1:20 Check Drive Shaft and Differential
4:13 Replacing the Rear Axle Bearings
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