Very nasty grinding on fast corner exit from LSD? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

JaguarXJ6 · 12-06-2013, 11:24 PM

Hi everyone, new owner here. I am hoping for some help with a noise on my new '14 BRZ.

I'm going through break-in and first attempt after 750 miles to take a 90 degree left turn aggressively to test limits of adhesion, I hear a wicked grinding noise coming from the rear for 1/2 second from the LSD. I would be in 2nd or 3rd doing around 35mph and punching it on turn exit.

Weight is loading up the right rear corner but I don't know if this is normal grinding or something wrong with fluid level or the diff is still super tight.

I will be changing fluids when I tick over 1000 miles this weekend however concerned about the noise after giving the car "some stick" and aggression.

The torsen in my Supra never protested this way but that could simply be it's well broken in and I never encountered it!
Thanks in advance.

Ghost 86 · 12-07-2013, 12:20 AM

If tc wasn't all the way off that's what you heard

fistpoint · 12-07-2013, 04:40 AM

Nasty sound indeed. I'm wondering if the increased forces will actually add wear to the suspension components over just letting the tires wear down from sliding without TC.

KelvinBRZ · 12-07-2013, 04:52 AM

Quote:

Originally Posted by JaguarXJ6

Hi everyone, new owner here. I am hoping for some help with a noise on my new '14 BRZ.

I'm going through break-in and first attempt after 750 miles to take a 90 degree left turn aggressively to test limits of adhesion, I hear a wicked grinding noise coming from the rear for 1/2 second from the LSD. I would be in 2nd or 3rd doing around 35mph and punching it on turn exit.

Weight is loading up the right rear corner but I don't know if this is normal grinding or something wrong with fluid level or the diff is still super tight.

I will be changing fluids when I tick over 1000 miles this weekend however concerned about the noise after giving the car "some stick" and aggression.

The torsen in my Supra never protested this way but that could simply be it's well broken in and I never encountered it!
Thanks in advance.

Yeah I've gotten this too from time to time. I would hear a grinding noise then the TC icon in the middle flash. Is this normal when going through an aggressive turn?

P.S. Congrats on your '14 BRZ! I see that you're from SB too

Captain Snooze · 12-07-2013, 05:52 AM

I am confident it is your traction control braking one wheel. Happens to me now and then on leaving t intersections and yes, the first time it happened I thought my car was imploding. As an experiment try turning your traction control off. Be ready for rear end break away

KelvinBRZ · 12-07-2013, 05:58 AM

Quote:

Originally Posted by Captain Snooze

I am confident it is your traction control braking one wheel. Happens to me now and then on leaving t intersections and yes, the first time it happened I thought my car was imploding. As an experiment try turning your traction control off. Be ready for rear end break away

I've always wanted to turn everything off when I go through a tight corner, but I am afraid of the consequences on public roads ...

Captain Snooze · 12-07-2013, 06:04 AM

^^
Go to a skid pan and have safe fun there.

AdrianG · 12-07-2013, 10:21 AM

That's just the traction control stabbing at the rear brakes. Nothing to be concerned about but you can get rid of it by turning the traction control all the way off.

As Russell Peters would say: "Be a Man! Do the right thing!"

- AdrianG

JaguarXJ6 · 12-07-2013, 11:53 AM

Thanks for the feedback, folks! I'll hold both buttons down for 5 seconds and then test it in a safer area.

I tried this in Sport last night and the same thing happened. I did feel the rear end shift subtly and both corners brake just as I straightened out, scrabbling for traction.

Even with TC and VSC on, there's still plenty of zip and cornering capability just driving around town and feeling like taking a turn faster.

infinite012 · 12-07-2013, 12:55 PM

Hold down your traction control button for like 5 seconds. No need to hold the sport button as well.

Captain Snooze · 12-07-2013, 04:06 PM

Quote:

Originally Posted by JaguarXJ6

Even with TC and VSC on, there's still plenty of zip and cornering capability just driving around town and feeling like taking a turn faster.

This.

12-06-2013, 11:24 PM	#1
JaguarXJ6 Member Join Date: Nov 2013 Drives: 2015 GT-R, 1993.5 Supra, 1995 XJR Location: Santa Barbara, CA Posts: 58 Thanks: 23 Thanked 37 Times in 14 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Very nasty grinding on fast corner exit from LSD? Hi everyone, new owner here. I am hoping for some help with a noise on my new '14 BRZ. I'm going through break-in and first attempt after 750 miles to take a 90 degree left turn aggressively to test limits of adhesion, I hear a wicked grinding noise coming from the rear for 1/2 second from the LSD. I would be in 2nd or 3rd doing around 35mph and punching it on turn exit. Weight is loading up the right rear corner but I don't know if this is normal grinding or something wrong with fluid level or the diff is still super tight. I will be changing fluids when I tick over 1000 miles this weekend however concerned about the noise after giving the car "some stick" and aggression. The torsen in my Supra never protested this way but that could simply be it's well broken in and I never encountered it! Thanks in advance. __________________ 2015 GT-R Pearl White with Ivory, Premium \| Stock, DD 1995 Jaguar XJR \| Turquoise Metallic \| I6 4.0L \| Eaton M90, 11psi \| 4L80E \| 1 of 12 of 400 1993.5 Supra Turbo \| Baltic Blue \| 6spd \| 3.77 Torsen LSD \| SP57 \| RPS manifold \| ViPEC V88 \| 525/500rwhp/tq

12-07-2013, 05:52 AM	#5
Captain Snooze Because compromise ® Join Date: Jan 2012 Drives: Red Herring Location: australia Posts: 7,794 Thanks: 4,033 Thanked 9,513 Times in 4,176 Posts Mentioned: 60 Post(s) Tagged: 0 Thread(s)	I am confident it is your traction control braking one wheel. Happens to me now and then on leaving t intersections and yes, the first time it happened I thought my car was imploding. As an experiment try turning your traction control off. Be ready for rear end break away __________________ My car is completely stock except for all the mods.

12-07-2013, 06:04 AM	#7
Captain Snooze Because compromise ® Join Date: Jan 2012 Drives: Red Herring Location: australia Posts: 7,794 Thanks: 4,033 Thanked 9,513 Times in 4,176 Posts Mentioned: 60 Post(s) Tagged: 0 Thread(s)	^^ Go to a skid pan and have safe fun there. __________________ My car is completely stock except for all the mods.

12-07-2013, 11:53 AM	#9
JaguarXJ6 Member Join Date: Nov 2013 Drives: 2015 GT-R, 1993.5 Supra, 1995 XJR Location: Santa Barbara, CA Posts: 58 Thanks: 23 Thanked 37 Times in 14 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Thanks for the feedback, folks! I'll hold both buttons down for 5 seconds and then test it in a safer area. I tried this in Sport last night and the same thing happened. I did feel the rear end shift subtly and both corners brake just as I straightened out, scrabbling for traction. Even with TC and VSC on, there's still plenty of zip and cornering capability just driving around town and feeling like taking a turn faster. __________________ 2015 GT-R Pearl White with Ivory, Premium \| Stock, DD 1995 Jaguar XJR \| Turquoise Metallic \| I6 4.0L \| Eaton M90, 11psi \| 4L80E \| 1 of 12 of 400 1993.5 Supra Turbo \| Baltic Blue \| 6spd \| 3.77 Torsen LSD \| SP57 \| RPS manifold \| ViPEC V88 \| 525/500rwhp/tq

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12-07-2013, 12:20 AM	#2
Ghost 86 Senior Member Join Date: May 2013 Drives: 2013 Whiteout FR-S Location: Maineville OH (Landen) Posts: 104 Thanks: 12 Thanked 40 Times in 22 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	If tc wasn't all the way off that's what you heard

12-07-2013, 04:40 AM	#3
fistpoint Senior Member Join Date: Dec 2011 Drives: Supercharged Golf Cart Location: Estados Unitos Posts: 1,196 Thanks: 75 Thanked 364 Times in 206 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Nasty sound indeed. I'm wondering if the increased forces will actually add wear to the suspension components over just letting the tires wear down from sliding without TC.

12-07-2013, 10:21 AM	#8
AdrianG Generally Well Liked Join Date: Aug 2013 Drives: '08 STi Hatch, '11 Outback 3.6R Location: Ontario Posts: 419 Thanks: 43 Thanked 197 Times in 125 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	That's just the traction control stabbing at the rear brakes. Nothing to be concerned about but you can get rid of it by turning the traction control all the way off. As Russell Peters would say: "Be a Man! Do the right thing!" - AdrianG

12-07-2013, 12:55 PM	#10
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)	Hold down your traction control button for like 5 seconds. No need to hold the sport button as well.

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