Strange noise at idle

[Alocoroco]

Hi all. Got a 15 mustang gt that's making a strange sound at idle. Once the clutch is pressed in it stops but comes back when it is released. Any ideas?

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[Shifting_Gears]

I’m having the exact same issue. Took it to a dealer and they “couldn’t replicate it”… LOL.

That being said, I am fairly certain it’s the slave cylinder (aka throwout bearing).

Are you having any issues shifting?

Transmission has to come out to fix it. The part is about $150, labor is what makes it so expensive if you don’t do it yourself.

Also a good time to replace your clutch (depending on milage) while it’s apart.

 

[Mike Pfeifer]

Slave cylinder is definitely not the same thing as a throw out bearing. Check the throw out bearing, may want to replace the rest of the clutch while you are in there.

 

[velocity550]

A friend of a friend was having this same exact issue on his 2019 gt with the MT-82, it turned out to be the throw out bearing. He replaced it himself in his garage and also put a Mcleod clutch in.

 

[Andrew@Lethal]

Hi all. Got a 15 mustang gt that's making a strange sound at idle. Once the clutch is pressed in it stops but comes back when it is released. Any ideas?

Your throwout bearing is on its way out. The part is not that expensive but it requires you to remove the transmission. We sell replacements here www.lethalperformance.com! Ford 2011-2017 Mustang 5.0L OEM Slave Cylinder

 

[Alocoroco]

Ahhhh mann. It only has 55k miles. Clutch feels solid

 

[Vlad Soare]

Slave cylinder is definitely not the same thing as a throw out bearing.

Technically they're not the same thing, of course. But as far as I know in the Mustang they're integrated into one unit and can't be replaced independently of one another.

 

[Shifting_Gears]

Slave cylinder is definitely not the same thing as a throw out bearing. Check the throw out bearing, may want to replace the rest of the clutch while you are in there.

Or we could call it a hydraulic throwout bearing. That’s why I related the two, since both are terms used often on here.

 

[Shifting_Gears]

Ahhhh mann. It only has 55k miles. Clutch feels solid

Don’t feel bad, my car is only at 39k.

 

[Mike Pfeifer]

Or we could call it a hydraulic throwout bearing. That’s why I related the two, since both are terms used often on here.

Didn’t realize they were integrated together as one unit. How do you bleed that thing?

 

[Vlad Soare]

You don't, unfortunately. You just push the pedal a hundred times and hope for the best.

 

[Stephen@lethal]

You could also use the Mcleod steel braided line with bleeder valve on it. It works pretty well. https://www.lethalperformance.com/mcleod-mustang-clutch-line-upgrade-all-05-2014-mustangs.html

 

[Shifting_Gears]

Didn’t realize they were integrated together as one unit. How do you bleed that thing?

The original Ford part is “self bleeding” and as Vlad said requires some fancy footwork to eventually bleed the air from the line and build pressure.

Exedy states theirs can be bench bled to jumpstart the process. A few other manufacturers make them, but I’m not sure if they’re able to be bench bled.

 

[Mike Pfeifer]

Interesting. This is what I’m used to working on.

 

[Shifting_Gears]

Interesting. This is what I’m used to working on.

Yeah, pretty standard. That’s how the T-45 looks in my old GT.

The MT-82 slave/TOB is fixed in place by two bolts and rides on the input shaft. There’s no release arm/lever since it’s actuated hydraulically.

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