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Is this a bad cv joint?

Posted on 5/27/14 at 9:43 pm
Posted by crazytigerfan69
everywhere
Member since Apr 2004
5702 posts
Posted on 5/27/14 at 9:43 pm
My daily driver 07 mazda 3 automatic is making some humming noises on the front drivers side while driving straight and turning to the right. It's more noticeable at higher speeds and when I am on a bouncy road. It's not the usual clicking sound that is associated with cv joints though.

It almost sounds like a piece of plastic is scraping the road every now and then, but I have checked and nothing is rubbing.
Posted by cdaniel76
Covington, LA
Member since Feb 2008
19699 posts
Posted on 5/27/14 at 9:47 pm to
Sounds more like a bearing possibly. Hub bearing.

Posted by HeadyMurphey
Los Santos
Member since Jan 2008
17185 posts
Posted on 5/27/14 at 9:53 pm to
Cv joint is going to click when you turn
Posted by crazytigerfan69
everywhere
Member since Apr 2004
5702 posts
Posted on 5/27/14 at 9:56 pm to
Wouldn't the bearing cause the tire to have extra play when it's jacked up? I jacked it up right before it got dark and couldn't feel any play in the tire.
Posted by cdaniel76
Covington, LA
Member since Feb 2008
19699 posts
Posted on 5/27/14 at 10:11 pm to
quote:

Wouldn't the bearing cause the tire to have extra play when it's jacked up?


That is a symptom of a bad bearing, yes, but it doesn't always show that way. First symptom you'll get from a bad bearing is usually a squeal or a roar. You won't notice any play in the wheel/tire until it's nearly reached its failure point.
Posted by Bleeding purple
Athens, Texas
Member since Sep 2007
25315 posts
Posted on 5/27/14 at 10:11 pm to
will it make the sound in neutral when you rev the engine?
Posted by crazytigerfan69
everywhere
Member since Apr 2004
5702 posts
Posted on 5/27/14 at 10:16 pm to
No only when riding down the highway at a good speed.
Posted by Bleeding purple
Athens, Texas
Member since Sep 2007
25315 posts
Posted on 5/27/14 at 10:19 pm to
slower speeds and tight turns don't illicit the sound?
Posted by crazytigerfan69
everywhere
Member since Apr 2004
5702 posts
Posted on 5/27/14 at 10:21 pm to
Nope
Posted by Bleeding purple
Athens, Texas
Member since Sep 2007
25315 posts
Posted on 5/27/14 at 10:26 pm to
that rules out CV joint, and anything to do with the main belt and pulleys.

So it is definitely drive train. Main wheel bearing, U joint, or possibly front drive shaft seal or bearing.
Posted by Real Pirate
NE LA
Member since Apr 2013
1879 posts
Posted on 5/27/14 at 10:29 pm to
Sounds like wheel bearing is a good start.
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