Left rear grinding noise under load - Ford Mustang Forum
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post #1 of 10 (permalink) Old 08-08-2015 Thread Starter
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Left rear grinding noise under load

Can't find this noise on our 05 GT. Only hear it under load as you turn to the right. It is a growl that travels through the rear chassis. Had a Ford mechanic look it over and he thinks it is a left rear noise for sure. For example, something like the axle moving just enough to send the rotor into the ABS sensor or the tone ring rubbing on the end of the axle housing. [it is neither of those]
Any thoughts?

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post #2 of 10 (permalink) Old 08-08-2015
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First thought was wheel bearing, but since it's not all the time, I would think that means it's not the problem. Is everything greased up like it should be? I wonder if you were to jack up the rear, and spin the wheels if you could hear a difference between the left rear and right rear.



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post #3 of 10 (permalink) Old 08-08-2015 Thread Starter
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Quote:
Originally Posted by ConfederateJoe View Post
First thought was wheel bearing, but since it's not all the time, I would think that means it's not the problem. Is everything greased up like it should be? I wonder if you were to jack up the rear, and spin the wheels if you could hear a difference between the left rear and right rear.
Ford guy says wheel bearing would need to be a tapered bearing to make a noise this way. All is lubed up.
Spinning the wheels sounds the same both sides. Can't produce the sound that way.
Ford guy says maybe the clutches and noise is transferring to the left?
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post #4 of 10 (permalink) Old 08-08-2015
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Quote:
Originally Posted by Daleford View Post
Ford guy says wheel bearing would need to be a tapered bearing to make a noise this way. All is lubed up.
Spinning the wheels sounds the same both sides. Can't produce the sound that way.
Ford guy says maybe the clutches and noise is transferring to the left?
I'm stumped. Someone else will be here and give you some more ideas, i'm sure.


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post #5 of 10 (permalink) Old 08-10-2015 Thread Starter
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TTT - Anyone?
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post #6 of 10 (permalink) Old 08-10-2015
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This sounds very similar to the noise I experienced when my rear clutch packs went bad. It sounds terrible....almost like a wheel bearing or something is going out. I was only experiencing the issue under load and when making right hand turns as well.

You may have your rear clutch packs checked out if you haven't already. Mine went out at 31k miles.

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post #7 of 10 (permalink) Old 08-10-2015 Thread Starter
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Quote:
Originally Posted by Blue_Streak View Post
This sounds very similar to the noise I experienced when my rear clutch packs went bad. It sounds terrible....almost like a wheel bearing or something is going out. I was only experiencing the issue under load and when making right hand turns as well.

You may have your rear clutch packs checked out if you haven't already. Mine went out at 31k miles.
OK I am at about 55K miles so that could be it. My mechanic had suggested new synthetic differential oil and friction modifier so it would be a good time to check the clutch packs.
So when you say they "went bad", do you mean only one rear wheel spun under acceleration?
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post #8 of 10 (permalink) Old 08-11-2015
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Quote:
Originally Posted by Daleford View Post
OK I am at about 55K miles so that could be it. My mechanic had suggested new synthetic differential oil and friction modifier so it would be a good time to check the clutch packs.
So when you say they "went bad", do you mean only one rear wheel spun under acceleration?
Honestly I didn't check it out to see if only one wheel was spinning myself, but that's what tends to happen when they go out. My car was only a week old to me at the time, so I took it straight back to the dealer and Ford covered it under their factory power train warranty.

I knew something was wrong just from the sound...it was unmistakable and very unpleasant....hard to describe, but it sounded like something metal on metal rubbing together with a lot of friction.

I hope this helps you out and that you're able to get your problem fixed up.

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post #9 of 10 (permalink) Old 08-11-2015 Thread Starter
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Yes, metal on metal - that is the sound!
THANKS for the help.
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You're very welcome! I hope you're able to get it all taken care of and start enjoying your Mustang without the additional noise soon.

Glad to be able to contribute to your thread.


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