Yes that is the rear bearing that are bad. That humming noise means the bearing need replacing. Buy them at ebay. How to tell what side. Easy, drive your van on the expressway, turn off radio and put windows up and listen for the hum. Start by chaning lanes as you do you'll lift weight from one side and this will make is less noisy. Meaning that if change to the lane on the right the van created a g-force leaning to the left side and this puts less weight on the bearing if the sound degrades this means the bearing to the right is bad if the sound stays the same try changing to your left lane and create that same g-force to allow the van to lean on the right side lifting the weight of the left bearing. And this should allow you to tell which bearing is bad. If the sound doesn't degrade at all. This means both bearing are bad. Changing them will solve your humming problem.
Changing them is no hard task. Take apart the brakes, rotor (note rotor will be hard to remove grab a hammer and tap between screws until rotor brakes loose), and with rotor off you should see the screws which is called a spindle. This entire piece is the bearing assembly. Take this off with four screws on the back side. Replace bearings and assemble again.
Sin. Jeffrey rodriguez.
Saturday, September 14th, 2013 AT 7:45 AM