AUTO FRS, GRINDING/VIBRATION FROM UNDERNEATH WHEN TURNING?? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Charleswinky · 05-20-2013, 01:28 AM

Hi im charles, im new to the forum, and i would js like to ask if its normal for an automatic FRS to have a grinding sound from underneath the center of the car (driveshaft area i suppose) whenever i make a turn accelerating from dead stop.. Has anyone had same issues??? Have u checked at the dealer?? Would appreciate the help.. Im frustrated

thanks!!!!!!

Chimpo · 05-20-2013, 09:36 AM

More info please:
Light/heavy/any Throttle?
Only when turning left/right/both?
Slight/full/any angle turn?

If it's easy to replicate, show your dealer.

infinite012 · 05-20-2013, 10:03 AM

I've got this, too, but my car is a manual. I attribute it to the LSD.

SloS14 · 05-20-2013, 10:12 AM

It's the LSD. It lets you know it's working.

Charleswinky · 05-20-2013, 01:29 PM

Thanks for ur concern. Its from full stop then accelerating fast and slow. Both right/left on HALF-FULL angle turns. It grinds for a second like something is dragging but goes away. I was thinkin it might be the driveshaft? But how could this be? I only have 2000miles and never driven the sh*t out of this car(like driving on a track). Most ive done to it was redline it sometimes during break-in so the motor wont bcome a lazy one..

TRDBen · 05-21-2013, 03:20 PM

It's just the Torsen LSD working.

infinite012 · 05-21-2013, 03:24 PM

Quote:

Originally Posted by Charleswinky

Thanks for ur concern. Its from full stop then accelerating fast and slow. Both right/left on HALF-FULL angle turns. It grinds for a second like something is dragging but goes away. I was thinkin it might be the driveshaft? But how could this be? I only have 2000miles and never driven the sh*t out of this car(like driving on a track). Most ive done to it was redline it sometimes during break-in so the motor wont bcome a lazy one..

If you read all of our replies, it's the LSD.

Charleswinky · 05-24-2013, 02:14 PM

Great, thanks for the info guys!

nonad · 05-28-2013, 01:51 PM

i was wondering too what it was, it happens to me..

the fact that it happens when you are turning definitely has something to do with LSD.
The slower the turn, the louder you hear the grinding, and you will actually hear it on the opposite side of the rear, which means it is actually the LSD.

whtchocla7e · 05-28-2013, 02:00 PM

There's is this one particular 90* turn on my way to work where I, sometimes, make the LSD grind and moan...

Be gentle and it won't happen.

tazz786 · 04-04-2015, 09:04 AM

Quote:

Originally Posted by TRDBen

It's just the Torsen LSD working.

extremely old post but this is happening to me on my 2015. Is there any way to make the vibration stop? I havent heard of any other car brands with a Limited Slip Differential do this but i may be wrong.

Poodles · 04-04-2015, 03:21 PM

No, it's normal. Most cars have tons of sound proofing to stop you from hearing it (or don't run a Torsen LSD).

It should get less noticeable as it's broken in and warmed up.

05-20-2013, 01:28 AM	#1
Charleswinky Member Join Date: Apr 2013 Drives: 2013 scion frs Location: California, USA Posts: 31 Thanks: 23 Thanked 8 Times in 5 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	AUTO FRS, GRINDING/VIBRATION FROM UNDERNEATH WHEN TURNING?? Hi im charles, im new to the forum, and i would js like to ask if its normal for an automatic FRS to have a grinding sound from underneath the center of the car (driveshaft area i suppose) whenever i make a turn accelerating from dead stop.. Has anyone had same issues??? Have u checked at the dealer?? Would appreciate the help.. Im frustrated thanks!!!!!!

05-21-2013, 03:20 PM	#6
TRDBen Member Join Date: Apr 2013 Drives: 2013 FRS Asphalt MT Location: San Luis Obispo Posts: 87 Thanks: 9 Thanked 18 Times in 13 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	It's just the Torsen LSD working. __________________ Speeding doesn't kill you, suddenly becoming stationary, that's what gets you.

05-28-2013, 02:00 PM	#10
whtchocla7e Senior Member Join Date: May 2012 Drives: 2013 FR-S Hot Lava Location: CT Posts: 424 Thanks: 30 Thanked 222 Times in 81 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	There's is this one particular 90* turn on my way to work where I, sometimes, make the LSD grind and moan... Be gentle and it won't happen. __________________ Live to drive another day

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05-20-2013, 09:36 AM	#2
Chimpo Senior Member Join Date: Sep 2012 Drives: '15 STi Ltd Location: Probably a location near you! Posts: 297 Thanks: 37 Thanked 149 Times in 61 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	More info please: Light/heavy/any Throttle? Only when turning left/right/both? Slight/full/any angle turn? If it's easy to replicate, show your dealer.

05-20-2013, 10:03 AM	#3
infinite012 Banned Join Date: Jan 2013 Drives: 13 DGM BRZ Ltd Location: Williamsburg, VA Posts: 974 Thanks: 294 Thanked 470 Times in 255 Posts Mentioned: 17 Post(s) Tagged: 4 Thread(s)	I've got this, too, but my car is a manual. I attribute it to the LSD.

05-20-2013, 10:12 AM	#4
SloS14 Senior Member Join Date: Apr 2013 Drives: 2013 FR-S whiteout Location: United States Posts: 726 Thanks: 381 Thanked 652 Times in 256 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	It's the LSD. It lets you know it's working.

05-20-2013, 01:29 PM	#5
Charleswinky Member Join Date: Apr 2013 Drives: 2013 scion frs Location: California, USA Posts: 31 Thanks: 23 Thanked 8 Times in 5 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Thanks for ur concern. Its from full stop then accelerating fast and slow. Both right/left on HALF-FULL angle turns. It grinds for a second like something is dragging but goes away. I was thinkin it might be the driveshaft? But how could this be? I only have 2000miles and never driven the sh*t out of this car(like driving on a track). Most ive done to it was redline it sometimes during break-in so the motor wont bcome a lazy one..

05-24-2013, 02:14 PM	#8
Charleswinky Member Join Date: Apr 2013 Drives: 2013 scion frs Location: California, USA Posts: 31 Thanks: 23 Thanked 8 Times in 5 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Great, thanks for the info guys!

04-04-2015, 03:21 PM	#12
Poodles Senior Member Join Date: Oct 2013 Drives: 2015 Series.Blue Location: Fort Worth, TX Posts: 1,781 Thanks: 88 Thanked 781 Times in 481 Posts Mentioned: 16 Post(s) Tagged: 0 Thread(s)	No, it's normal. Most cars have tons of sound proofing to stop you from hearing it (or don't run a Torsen LSD). It should get less noticeable as it's broken in and warmed up.

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