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Loud Humming

rem789rem789 Posts: 1
edited May 2015 in Mazda
Hi gang. New here. I have been hearing a loud "humming" like noise coming from my 07 CX-9 for some time now. It's almost like it's not switching gears..but it is changing gears, just sounds really loud however is running just fine. I'm wondering if it's a bearing or something. Anyone else have similar issues? Thanks in advance!
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