Constant "Grinding" Sound in Transmission? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

megamarines · 08-28-2015, 03:21 AM

Ok, so this just started a few hours ago, but my FRS suddenly started making a low whirring noise that almost sounds like a bike chain on the ground. It happens AROUND 4-4.5K RPMS and it almost sounds as if its occurring on the underside versus in the engine and is rather worrying. It's a decent volume, but it's mostly concerning since it happens in the lower gears. Clutch engagement and gear movement is fine, but it's the sound of it definitely feels like moving parts versus rattling exhaust or anything.

Any help or ideas? I think it might be a glazed clutch, but I haven't driven weird or hard on it at all.

I also got some video/bad sound clips of it. The sound is definitely right around 4-4.5k RPM's and can hover there even with my foot leveled on the gas. It sounds akin to a chain being dragged on the ground and is definitely coming from the front end of the car; not the rear or behind the drivers seat. Definitely a "grinding" whirring noise.

I apologize for my girlfriend's Cloverfield-esque footage haha

J-Money · 08-28-2015, 09:45 PM

Can't play video on my phone. But sounds like what I have. It starts around 4k and goes all the way up to 7k in every gear. I think I fucked up the clutch in all honesty because I used to ride it and accidently grind gears. I'm at 40k miles. Getting it checked tomorrow. I'm prepared to spend some cash on new clutch etc. My first manual car. But I drive it fine now. It must of gradually gotten worse over time. B

Packofcrows · 08-30-2015, 12:45 AM

Eww. That sounds like a wire scratching the clutch (use headphones, you'll hear it then).

Does it have a mechanical sound like grinding following at higher rpm?

Hey, if you take it apart, check clutch bearing. You ever drive it hard? Even once? Not all cars react the same even if they the same car. Maybe the surface on the fingers(name?) aren't wearing out evenly. If it does that same sound on all gears, imo check drive shaft front. I googled and I guess its called 'torque shaft?'

endless_pain · 09-10-2015, 08:46 AM

This is mine after a track event last month:
[ame="https://www.youtube.com/watch?v=Wr5aeX1sUXg"]20150830 160659 - YouTube[/ame]

Don't have shift problems either. Happens in low to mid speeds and all gears but was not happening in 5th when this video was taken. Hope is the throw out bearing.

RD1428 · 11-20-2015, 04:44 PM

So what was the issue? Having a similar problem like the OP

stevesnj · 11-20-2015, 09:43 PM

Something may be loose, cat shield or similar. gently bang on some things in the exhaust area with the rubber handle of a hammer. Firm taps may rattle something.

Packofcrows · 11-20-2015, 10:26 PM

Quote:

Originally Posted by endless_pain

This is mine after a track event last month:

Don't have shift problems either. Happens in low to mid speeds and all gears but was not happening in 5th when this video was taken. Hope is the throw out bearing.

TRD exhaust I hear?

endless_pain · 11-25-2015, 07:37 AM

Quote:

Originally Posted by Packofcrows

TRD exhaust I hear?

Nop. PTuning header, OP, catted DP, OEM mid-pipe and Nameless track pipe with their biggest muffler option.

Cartman · 02-28-2016, 10:34 PM

Quote:

Originally Posted by endless_pain

This is mine after a track event last month:

Don't have shift problems either. Happens in low to mid speeds and all gears but was not happening in 5th when this video was taken. Hope is the throw out bearing.

What ended up being your issue, mine is doing the exact same sound after my last track day.

nimble · 03-06-2016, 01:22 AM

@megamarines Did you ever find the issue? Mine's doing this as well.

08-28-2015, 03:21 AM	#1
megamarines Senior Member Join Date: Aug 2014 Drives: 2015 FR-S RS 1.0 Location: Walnut Creek, CA Posts: 368 Thanks: 144 Thanked 177 Times in 91 Posts Mentioned: 29 Post(s) Tagged: 2 Thread(s)	Constant "Grinding" Sound in Transmission? Ok, so this just started a few hours ago, but my FRS suddenly started making a low whirring noise that almost sounds like a bike chain on the ground. It happens AROUND 4-4.5K RPMS and it almost sounds as if its occurring on the underside versus in the engine and is rather worrying. It's a decent volume, but it's mostly concerning since it happens in the lower gears. Clutch engagement and gear movement is fine, but it's the sound of it definitely feels like moving parts versus rattling exhaust or anything. Any help or ideas? I think it might be a glazed clutch, but I haven't driven weird or hard on it at all. I also got some video/bad sound clips of it. The sound is *definitely* right around 4-4.5k RPM's and can hover there even with my foot leveled on the gas. It sounds akin to a chain being dragged on the ground and is definitely coming from the front end of the car; not the rear or behind the drivers seat. Definitely a "grinding" whirring noise. I apologize for my girlfriend's Cloverfield-esque footage haha

08-30-2015, 12:45 AM	#3
Packofcrows hey you, yeah you <3 Join Date: Jul 2012 Drives: 2014 37J FR-S Location: Monterey County, CA Posts: 2,713 Thanks: 905 Thanked 1,258 Times in 809 Posts Mentioned: 38 Post(s) Tagged: 3 Thread(s)	Eww. That sounds like a wire scratching the clutch (use headphones, you'll hear it then). Does it have a mechanical sound like grinding following at higher rpm? Hey, if you take it apart, check clutch bearing. You ever drive it hard? Even once? Not all cars react the same even if they the same car. Maybe the surface on the fingers(name?) aren't wearing out evenly. If it does that same sound on all gears, imo check drive shaft front. I googled and I guess its called 'torque shaft?' __________________ Got my TRD wheels and TRD louvers. Thanks!!! Last edited by Packofcrows; 08-30-2015 at 01:02 AM.

11-20-2015, 09:43 PM	#6
stevesnj Senior Member Join Date: May 2013 Drives: 2016 FR-S Oceanic Blue Location: Southern NJ Posts: 2,958 Thanks: 2,158 Thanked 1,601 Times in 923 Posts Mentioned: 30 Post(s) Tagged: 2 Thread(s)	Something may be loose, cat shield or similar. gently bang on some things in the exhaust area with the rubber handle of a hammer. Firm taps may rattle something. __________________ My 2016 Build thread TRD Exhaust with custom quad tips, TRD Lowering Springs,TRD Quick shifter,LED;DRL, Projectors, and turn signals. Re-badge, 86 Nanny, WinmaxW2 Pads, K&N Drop In, Antenna delete

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08-28-2015, 09:45 PM	#2
J-Money Senior Member Join Date: Dec 2012 Drives: GT-86 Location: FatFour Posts: 218 Thanks: 26 Thanked 20 Times in 17 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Can't play video on my phone. But sounds like what I have. It starts around 4k and goes all the way up to 7k in every gear. I think I fucked up the clutch in all honesty because I used to ride it and accidently grind gears. I'm at 40k miles. Getting it checked tomorrow. I'm prepared to spend some cash on new clutch etc. My first manual car. But I drive it fine now. It must of gradually gotten worse over time. B

09-10-2015, 08:46 AM	#4
endless_pain Pissin off regressives Join Date: Feb 2014 Drives: They have engines. Location: Socialist Republic of Maryland Posts: 230 Thanks: 231 Thanked 119 Times in 67 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	This is mine after a track event last month: [ame="https://www.youtube.com/watch?v=Wr5aeX1sUXg"]20150830 160659 - YouTube[/ame] Don't have shift problems either. Happens in low to mid speeds and all gears but was not happening in 5th when this video was taken. Hope is the throw out bearing.

11-20-2015, 04:44 PM	#5
RD1428 Senior Member Join Date: Sep 2012 Drives: 2013 Scion FRS Location: CA/NH Posts: 209 Thanks: 16 Thanked 44 Times in 33 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	So what was the issue? Having a similar problem like the OP

03-06-2016, 01:22 AM	#10
nimble Member Join Date: Oct 2015 Drives: 2013 WO FR-S Location: SoCal/NorCal Posts: 68 Thanks: 4 Thanked 11 Times in 8 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	@megamarines Did you ever find the issue? Mine's doing this as well.

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