Resonance at around 70 MPH? - Page 5 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Subie · 11-19-2012, 08:40 PM

I met with the district rep. again today after a long hiatus. Supposedly the delay was due to not having a BRZ available for a direct comparison. In any case, the noise has gotten somewhat quieter with time and thus I had a difficult time pointing it out to the rep., even though I was able to hear it with my ears being attuned to it. To try to isolate the noise from road noise and other distractions on the road test, they put the car on a lift to see if they could hear the noise that way. The preliminary word is that the rep. heard a noise from the differential and will be putting another BRZ in the air tomorrow to try to do a comparison with my mine. Hopefully the other BRZ will either not make the same noise or the rep. will consider the noise abnormal due to its annoying nature, and replace the differential. I'll keep you posted as I find out more.

ducks · 11-19-2012, 10:05 PM

my car is noticably quieter on the highway after switching the diff fluid to motul gear 300

Subie · 11-19-2012, 10:13 PM

Quote:

Originally Posted by ducks

my car is noticably quieter on the highway after switching the diff fluid to motul gear 300

...which is precisely why I didn't change my differential fluid. I'd rather not mask the problem with gear lube.

Subie · 11-20-2012, 09:55 PM

Good news! The dealer called and told me that the district rep. did not hear the same noise on the BRZ he was using for comparison, and they therefore ordered a new differential for me. I'll be getting it installed sometime after the Thanksgiving holiday, either next week or the week thereafter.

White64Goat · 11-20-2012, 10:52 PM

Has anyone tried a different set of wheels & tires (different brand tire) to see if the noise goes away? Tire tread can cause this type of noise as well.

Subie · 11-20-2012, 11:16 PM

Quote:

Originally Posted by White64Goat

Has anyone tried a different set of wheels & tires (different brand tire) to see if the noise goes away? Tire tread can cause this type of noise as well.

If the district rep. heard the noise with the car in the air, it's not the tires.

FirestormFRS · 11-20-2012, 11:25 PM

Thanks for the update! Mine has reduced to the point of not being a bother but if it comes back ill for sure take it in.

DanoFA20 · 12-03-2012, 07:38 AM

Quote:

Originally Posted by clayrush

When I am 70-80 I can hear a sort of high pitch wine. I had the same thing in my celica.

I have that same high pitched whining sound around same speed ever figure out what it was?

clayrush · 12-03-2012, 04:18 PM

Quote:

Originally Posted by DanoFA20

I have that same high pitched whining sound around same speed ever figure out what it was?

na

cant here it over the exhaust we have on the car now.

Subie · 12-22-2012, 11:16 PM

Edit: The new differential makes the same noise.

BigFatFlip · 12-23-2012, 09:33 AM

I had the same high pitched "tuning fork" noise at 70 mph as everybody seems to be describing. Recently did the noise generator delete and noticed that the noise is gone. Not sure if this is what everybody else is hearing, but it would be worth a try just plugging the noise generator hole in your passenger side to see if it fixes the problem (easier than having to take it to the dealer

)

ap5512 · 01-06-2013, 01:32 PM

Quote:

Originally Posted by Subie

Anyone with this problem: the noise is coming from the rear differential. After having the differential replaced, the noise at 70 MPH is gone. It's so much more pleasant road-tripping in this car now.

So did the Subaru rep say anything about a TSB or any other fix coming out soon? I hear the resonance once in a while since I don't really do highway driving too much...

Subie · 01-06-2013, 02:30 PM

Quote:

Originally Posted by ap5512

So did the Subaru rep say anything about a TSB or any other fix coming out soon? I hear the resonance once in a while since I don't really do highway driving too much...

He did not. Truth be told, there is still a little additional noise/resonance at that speed that the differential replacement did not cure. I'm thinking that it may be something that is common to all 86s, but that mine was making additional noise that, coupled with the noise that was already there, made that tuning fork-like noise. I also still hear the noise at 35 MPH that I did before -- does your car make a cyclical noise at that speed?

Subie · 05-29-2013, 10:23 PM

I'm bumping this thread to see if there's any new information from anyone with this issue or if anyone else has this issue that has not spoken up.

12-22-2012, 11:16 PM	#66
Subie Señor Member Join Date: Apr 2012 Drives: 2013 SSM DZE BRZ Location: SC Posts: 947 Thanks: 728 Thanked 405 Times in 196 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Edit: The new differential makes the same noise. Last edited by Subie; 05-29-2013 at 10:22 PM.

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11-19-2012, 08:40 PM	#57
Subie Señor Member Join Date: Apr 2012 Drives: 2013 SSM DZE BRZ Location: SC Posts: 947 Thanks: 728 Thanked 405 Times in 196 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	I met with the district rep. again today after a long hiatus. Supposedly the delay was due to not having a BRZ available for a direct comparison. In any case, the noise has gotten somewhat quieter with time and thus I had a difficult time pointing it out to the rep., even though I was able to hear it with my ears being attuned to it. To try to isolate the noise from road noise and other distractions on the road test, they put the car on a lift to see if they could hear the noise that way. The preliminary word is that the rep. heard a noise from the differential and will be putting another BRZ in the air tomorrow to try to do a comparison with my mine. Hopefully the other BRZ will either not make the same noise or the rep. will consider the noise abnormal due to its annoying nature, and replace the differential. I'll keep you posted as I find out more.

11-19-2012, 10:05 PM	#58
ducks Senior Member Join Date: Apr 2012 Drives: car Location: usa Posts: 205 Thanks: 41 Thanked 74 Times in 35 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	my car is noticably quieter on the highway after switching the diff fluid to motul gear 300

11-20-2012, 09:55 PM	#60
Subie Señor Member Join Date: Apr 2012 Drives: 2013 SSM DZE BRZ Location: SC Posts: 947 Thanks: 728 Thanked 405 Times in 196 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Good news! The dealer called and told me that the district rep. did not hear the same noise on the BRZ he was using for comparison, and they therefore ordered a new differential for me. I'll be getting it installed sometime after the Thanksgiving holiday, either next week or the week thereafter.

11-20-2012, 10:52 PM	#61
White64Goat Senior Member Join Date: Jun 2012 Drives: 13 BRZ CBS LTD MT, 02 WRX Location: Fred. Co. Md. Posts: 2,351 Thanks: 65 Thanked 1,113 Times in 628 Posts Mentioned: 19 Post(s) Tagged: 1 Thread(s)	Has anyone tried a different set of wheels & tires (different brand tire) to see if the noise goes away? Tire tread can cause this type of noise as well.

11-20-2012, 11:25 PM	#63
FirestormFRS Senior Member Join Date: Jul 2012 Drives: 2013 FR-S Location: Anytown Posts: 920 Thanks: 73 Thanked 643 Times in 302 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Thanks for the update! Mine has reduced to the point of not being a bother but if it comes back ill for sure take it in.

12-23-2012, 09:33 AM	#67
BigFatFlip sleep, drive, eat, repeat Join Date: Mar 2012 Drives: '13 BRZ, '12 Outback Location: Sack of Potatoes Posts: 4,431 Thanks: 2,630 Thanked 3,797 Times in 1,981 Posts Mentioned: 188 Post(s) Tagged: 4 Thread(s)	I had the same high pitched "tuning fork" noise at 70 mph as everybody seems to be describing. Recently did the noise generator delete and noticed that the noise is gone. Not sure if this is what everybody else is hearing, but it would be worth a try just plugging the noise generator hole in your passenger side to see if it fixes the problem (easier than having to take it to the dealer )

05-29-2013, 10:23 PM	#70
Subie Señor Member Join Date: Apr 2012 Drives: 2013 SSM DZE BRZ Location: SC Posts: 947 Thanks: 728 Thanked 405 Times in 196 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	I'm bumping this thread to see if there's any new information from anyone with this issue or if anyone else has this issue that has not spoken up.

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