I hear a drone noise (or loud humming) when I drive my 2010 Toyota Highlander.

Asked by Jul 18, 2017 at 09:54 AM about the 2010 Toyota Highlander Base

Question type: General

I have had my mechanic look at it.  He says the ball bearings are fine.  We cannot figure out why this noise commenced.  It's been over a year.  Any suggestions or thoughts on what could be causing this?

2 Answers

860

Check your differential oil levels front and back. And the transfer case oil too. It might be abnormal tire wear or low on air. I hope this helps.

175

Check for uneven wear on your Tires. A bad strut(s) can cause cupping of the tread on tires, resulting in a droning sound that gets louder the faster the vehicle is driven.

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