follow ft86club on our blog, twitter or facebook.
FT86CLUB
Ft86Club
RR Racing
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Scion FR-S Forum | Subaru BRZ Forum | Toyota 86 GT 86 Forum | AS1 Forum - FT86CLUB > Scion FR-S / Toyota 86 > Scion FR-S / Toyota 86 GT86 General Forum

Scion FR-S / Toyota 86 GT86 General Forum The place to start for the Scion FR-S / Toyota 86 | GT86


User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-07-2016, 10:49 PM   #1
notout86
Senior Member
 
Join Date: Apr 2013
Drives: GTS 86 auto
Location: Australia
Posts: 479
Thanks: 250
Thanked 122 Times in 95 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
grinding marbles sound

A couple of times recently, when starting off across a non-level surface, at a slight right-turn angle, I have had a grinding sound like marbles rolling around in the diff or left rear wheel area. It only lasts a couple of seconds. On one occasion I started off very slowly (not wanting to scrape the nose), the other time a bit faster. The car was cold one time (travelled 300metres) and hot the other (travelled 30Km.)

The diff is the original equipment torsen one. Its oil was changed about 10,000Km back. The car has done 38,000Km of only normal driving. There are no leaks.

It's an auto and the sound does not seem to come from the transmission. Brake pads are about 30% worn.

Any ideas please people?
__________________
GTS86 Auto (Australia)

Last edited by notout86; 09-08-2016 at 12:37 AM.
notout86 is online now   Reply With Quote
Old 09-07-2016, 11:00 PM   #2
humfrz
Senior Member
 
Join Date: May 2013
Drives: 2013 FR-S, white, MT
Location: Puyallup, WA
Posts: 18,499
Thanks: 12,729
Thanked 16,556 Times in 9,061 Posts
Mentioned: 455 Post(s)
Tagged: 2 Thread(s)
Well, notout86, first I'd suggest you check the axle nut on each side to make sure they are tight.

If that doesn't fix it, I'd suggest carefully checking the rear axle universals to see if they are binding.

Also, you might check to make sure the brake calipers are tight.


humfrz
humfrz is offline   Reply With Quote
The Following User Says Thank You to humfrz For This Useful Post:
notout86 (09-08-2016)
Old 09-07-2016, 11:03 PM   #3
finch1750
Undisputed El Presidente
 
finch1750's Avatar
 
Join Date: Jun 2012
Drives: Zenki 37J ZN6
Location: Stockton, CA
Posts: 10,651
Thanks: 8,329
Thanked 8,458 Times in 4,777 Posts
Mentioned: 359 Post(s)
Tagged: 33 Thread(s)
It could be a wheel bearing starting to go bad. But it would make the sound all the time and get louder the faster you went (ie rotational issue)
__________________

"Just like how a strut bar somehow enables you to corner 20MPH faster around a cloverleaf on-ramp, when the reality is, you can do it already but you just don't have to balls to do it." - CSG David
finch1750 is offline   Reply With Quote
Old 09-08-2016, 01:11 AM   #4
notout86
Senior Member
 
Join Date: Apr 2013
Drives: GTS 86 auto
Location: Australia
Posts: 479
Thanks: 250
Thanked 122 Times in 95 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by humfrz View Post
Well, notout86, first I'd suggest you check the axle nut on each side to make sure they are tight.

If that doesn't fix it, I'd suggest carefully checking the rear axle universals to see if they are binding.

Also, you might check to make sure the brake calipers are tight.


humfrz
Thx humfrz. The universals binding sounds likely as the car had one rear wheel higher than the other at the time. Forgive me, I'm no expert but before I get my hands dirty, wouldn't I be hearing the noise often if the reason was because of those suggestions?
__________________
GTS86 Auto (Australia)
notout86 is online now   Reply With Quote
Old 09-08-2016, 01:25 AM   #5
RJasonKlein
Senior Member
 
RJasonKlein's Avatar
 
Join Date: Jul 2014
Drives: 2013 Scion FR-S 10 Series
Location: Clarendon Hills, IL
Posts: 599
Thanks: 420
Thanked 338 Times in 195 Posts
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
The Torsen LSD in these cars frequently chatters when making turns at low speed. My guess is that's what you're experiencing - if so, it's totally normal and nothing to be worried about.

Last edited by RJasonKlein; 09-08-2016 at 01:27 AM. Reason: Corrected a typographical error.
RJasonKlein is offline   Reply With Quote
The Following 2 Users Say Thank You to RJasonKlein For This Useful Post:
notout86 (09-08-2016), Ultramaroon (09-08-2016)
Old 09-08-2016, 01:35 AM   #6
notout86
Senior Member
 
Join Date: Apr 2013
Drives: GTS 86 auto
Location: Australia
Posts: 479
Thanks: 250
Thanked 122 Times in 95 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by RJasonKlein View Post
The Torsen LSD in these cars frequently chatters when making turns at low speed. My guess is that's what you're experiencing - if so, it's totally normal and nothing to be worried about.
Thx RJasonKlein. I am hoping that turns out to be the case but I'm wondering why I have only heard it twice and recently. Maybe it shows up when the diff has worn a little but my car is low mileage and fairly gently driven. As for wear I changed my diff oil twice at 20,000Km.. the first time to flush after seeing the stuff on the magnetic drain plug.
__________________
GTS86 Auto (Australia)
notout86 is online now   Reply With Quote
Old 09-08-2016, 01:53 AM   #7
humfrz
Senior Member
 
Join Date: May 2013
Drives: 2013 FR-S, white, MT
Location: Puyallup, WA
Posts: 18,499
Thanks: 12,729
Thanked 16,556 Times in 9,061 Posts
Mentioned: 455 Post(s)
Tagged: 2 Thread(s)
Quote:
Originally Posted by notout86 View Post
Thx humfrz. The universals binding sounds likely as the car had one rear wheel higher than the other at the time. Forgive me, I'm no expert but before I get my hands dirty, wouldn't I be hearing the noise often if the reason was because of those suggestions?
Well, like @RJasonKlein mentioned, it could be that the differential is chattering at you.

However, if the noise persists, especially if it gets worse, I would recommend that you have the axle nuts checked and the axles inspected.


humfrz
humfrz is offline   Reply With Quote
The Following User Says Thank You to humfrz For This Useful Post:
Ultramaroon (09-08-2016)
Old 09-08-2016, 02:17 AM   #8
Ultramaroon
bromatic train injury
 
Ultramaroon's Avatar
 
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 20,199
Thanks: 29,912
Thanked 19,549 Times in 10,732 Posts
Mentioned: 749 Post(s)
Tagged: 9 Thread(s)
If you had to judge your driving history up to now, is it possible that you have gained a new level of comfort in gassing it through a tight turn?
__________________
Ultramaroon is offline   Reply With Quote
Old 09-08-2016, 02:22 AM   #9
notout86
Senior Member
 
Join Date: Apr 2013
Drives: GTS 86 auto
Location: Australia
Posts: 479
Thanks: 250
Thanked 122 Times in 95 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Ultramaroon View Post
If you had to judge your driving history up to now, is it possible that you have gained a new level of comfort in gassing it through a tight turn?
Sorry. I don't understand the relevance to the thread or maybe you are too subtle for me.
__________________
GTS86 Auto (Australia)
notout86 is online now   Reply With Quote
The Following User Says Thank You to notout86 For This Useful Post:
Ultramaroon (09-08-2016)
Old 09-08-2016, 02:29 AM   #10
notout86
Senior Member
 
Join Date: Apr 2013
Drives: GTS 86 auto
Location: Australia
Posts: 479
Thanks: 250
Thanked 122 Times in 95 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Thanks everyone. Be assured that if a definitive answer is discovered I will post it.

I'll keep driving and see what happens and follow up on your suggestions if the problem persists.
__________________
GTS86 Auto (Australia)
notout86 is online now   Reply With Quote
Old 09-08-2016, 02:59 AM   #11
aegisdrgn
Senior Member
 
aegisdrgn's Avatar
 
Join Date: Dec 2013
Drives: Scion FR-S 10 Series #2263
Location: Los Angeles
Posts: 471
Thanks: 208
Thanked 274 Times in 178 Posts
Mentioned: 4 Post(s)
Tagged: 2 Thread(s)
Quote:
Originally Posted by notout86 View Post
Sorry. I don't understand the relevance to the thread or maybe you are too subtle for me.
I think he means that you've probably taken corners at normal speeds up till now, and now that you're more comfortable with the car, you're taking the corners at speeds approaching "spirited" and since the diff's limited-slip capabilities only kicks in at higher loads, you might actually be hearing it in action now.

I think. One too many
aegisdrgn is offline   Reply With Quote
The Following User Says Thank You to aegisdrgn For This Useful Post:
Ultramaroon (09-08-2016)
Old 09-08-2016, 03:37 AM   #12
turtlefeeder
Senior Member
 
turtlefeeder's Avatar
 
Join Date: Apr 2016
Drives: UltraMFrS
Location: OC
Posts: 698
Thanks: 203
Thanked 134 Times in 99 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
I have this sound issue at the rear of the car right now, I had someone bounce on the open trunk and found out its my LCA join xD might want to have someone sit on your trunk incase 😅😅😄😄

Sent from my SM-P600 using Tapatalk
turtlefeeder is offline   Reply With Quote
The Following User Says Thank You to turtlefeeder For This Useful Post:
notout86 (09-08-2016)
Old 09-08-2016, 05:54 AM   #13
notout86
Senior Member
 
Join Date: Apr 2013
Drives: GTS 86 auto
Location: Australia
Posts: 479
Thanks: 250
Thanked 122 Times in 95 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by aegisdrgn View Post
I think he means that you've probably taken corners at normal speeds up till now, and now that you're more comfortable with the car, you're taking the corners at speeds approaching "spirited" and since the diff's limited-slip capabilities only kicks in at higher loads, you might actually be hearing it in action now.

I think. One too many
I hope he doesn't think that. As I said, it has only happened when moving slowly, actually around walking pace.
__________________
GTS86 Auto (Australia)
notout86 is online now   Reply With Quote
Old 09-08-2016, 12:53 PM   #14
Ultramaroon
bromatic train injury
 
Ultramaroon's Avatar
 
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 20,199
Thanks: 29,912
Thanked 19,549 Times in 10,732 Posts
Mentioned: 749 Post(s)
Tagged: 9 Thread(s)
Quote:
Originally Posted by aegisdrgn View Post
I think he means that you've probably taken corners at normal speeds up till now, and now that you're more comfortable with the car, you're taking the corners at speeds approaching "spirited" and since the diff's limited-slip capabilities only kicks in at higher loads, you might actually be hearing it in action now.

I think. One too many
Exactly.
__________________
Ultramaroon is offline   Reply With Quote
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
jar of marbles sound like in engine tintumz22 Issues | Warranty | Recalls / TSB 25 03-21-2014 11:18 AM
Grinding sound under acceleration Therightmike Subaru BRZ General Forum 9 08-20-2013 02:00 AM
AUTO FRS, GRINDING SOUND COMING FROM UNDERNEATH? Charleswinky Scion FR-S / Toyota 86 GT86 General Forum 12 05-21-2013 08:51 PM
Cold morning and horrible grinding/screeching sound Books Issues | Warranty | Recalls / TSB 1 11-14-2012 03:18 PM
Manual grinding sound deedz Engine, Exhaust, Transmission 22 07-20-2012 10:05 PM


All times are GMT -4. The time now is 10:57 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Garage vBulletin Plugins by Drive Thru Online, Inc.