Grinding or rubbing - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

IsaiahW · 10-31-2022, 11:59 AM

Im unfortunately suffering a terrible noise after doing my cd009 swap with the PBM diff and subframe risers. Ive checked hub bearings, axles(which are the 1000hp dss kit that includes the new hubs), driveshaft and anything else I think would cause problems. Its more so when I’m cruising to a stop or when i simply take my foot off the accelerator even without braking. Then i came across the whole pinion angle thing which i don’t know much about and didn’t consider it when mounting the trans. Lastly i notice very tight clearance above the diff from the trunk floor I’m not sure how much vibration is present due to the solid bushings but could that be the root of the problem. Vibration goes away when accelerating. I tried to get the best of both worlds with a strong transmission and strong axles with supporting mods to accomplish a good setup but im starting to realize there are limitations with this chassis

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Ultramaroon · 10-31-2022, 02:27 PM

Is it coming from the diff on decel with engine braking? Does the noise change when you coast in neutral?

IsaiahW · 10-31-2022, 03:39 PM

Yes i get it only on decel with engine braking i haven’t tried coasting long in neutral yet the noise is bad i try to avoid driving it

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Ultramaroon · 10-31-2022, 07:02 PM

Was the diff known to be working properly before you acquired it?

IsaiahW · 10-31-2022, 07:11 PM

Yes its the original diff but i did some more inspections i noticed the axle on the passenger side is not flush like the one on the driver side

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Ultramaroon · 10-31-2022, 07:42 PM

Circlip should just pop into the detent. Tap it with a plastic mallet or a dead-blow.

Or how I've done it is to just pull it out a little more and give it a good shove by hand.

IsaiahW · 10-31-2022, 07:45 PM

Imma inspect the splines then retry again

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Ultramaroon · 10-31-2022, 10:03 PM

Quote:

Originally Posted by IsaiahW

Imma inspect the splines then retry again

I don't think it contributes to the noise but I'm wrong plenty. It's a good catch either way.

IsaiahW · 11-03-2022, 09:22 PM

Just an update I believe my diff is bad I took pictures with the vehicle rested down and discovered this! This is the same axle that seemed to have “popped” out. The axle shaft seals are new so what I believe is the diff/subframe risers are doing its job but a little too much. The right axle seems to keep coming out and putting stress on the bearing since the axles are sort of angled up now. Just a uneducated guess what you think? Because this only started after the risers were installed

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10-31-2022, 11:59 AM	#1
IsaiahW Senior Member Join Date: Mar 2020 Drives: 2013 Subaru brz limited Location: Hampton va Posts: 105 Thanks: 15 Thanked 32 Times in 16 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Grinding or rubbing Im unfortunately suffering a terrible noise after doing my cd009 swap with the PBM diff and subframe risers. Ive checked hub bearings, axles(which are the 1000hp dss kit that includes the new hubs), driveshaft and anything else I think would cause problems. Its more so when I’m cruising to a stop or when i simply take my foot off the accelerator even without braking. Then i came across the whole pinion angle thing which i don’t know much about and didn’t consider it when mounting the trans. Lastly i notice very tight clearance above the diff from the trunk floor I’m not sure how much vibration is present due to the solid bushings but could that be the root of the problem. Vibration goes away when accelerating. I tried to get the best of both worlds with a strong transmission and strong axles with supporting mods to accomplish a good setup but im starting to realize there are limitations with this chassis [IMG]https://uploads.tapatalk-cdn.com/20221031/7009649d09943f***f6a82b6626a5044.jpg[/IMG] Sent from my iPhone using Tapatalk

10-31-2022, 02:27 PM	#2
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,872 Thanks: 52,141 Thanked 36,522 Times in 18,923 Posts Mentioned: 1107 Post(s) Tagged: 9 Thread(s)	Is it coming from the diff on decel with engine braking? Does the noise change when you coast in neutral? __________________ service manuals

10-31-2022, 07:02 PM	#4
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,872 Thanks: 52,141 Thanked 36,522 Times in 18,923 Posts Mentioned: 1107 Post(s) Tagged: 9 Thread(s)	Was the diff known to be working properly before you acquired it? __________________ service manuals

10-31-2022, 07:42 PM	#6
Ultramaroon 義理チョコ Join Date: Sep 2014 Drives: a 13 e8h frs Location: vantucky, wa Posts: 31,872 Thanks: 52,141 Thanked 36,522 Times in 18,923 Posts Mentioned: 1107 Post(s) Tagged: 9 Thread(s)	Circlip should just pop into the detent. Tap it with a plastic mallet or a dead-blow. Or how I've done it is to just pull it out a little more and give it a good shove by hand. __________________ service manuals

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10-31-2022, 03:39 PM	#3
IsaiahW Senior Member Join Date: Mar 2020 Drives: 2013 Subaru brz limited Location: Hampton va Posts: 105 Thanks: 15 Thanked 32 Times in 16 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Yes i get it only on decel with engine braking i haven’t tried coasting long in neutral yet the noise is bad i try to avoid driving it Sent from my iPhone using Tapatalk

10-31-2022, 07:11 PM	#5
IsaiahW Senior Member Join Date: Mar 2020 Drives: 2013 Subaru brz limited Location: Hampton va Posts: 105 Thanks: 15 Thanked 32 Times in 16 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Yes its the original diff but i did some more inspections i noticed the axle on the passenger side is not flush like the one on the driver side Sent from my iPhone using Tapatalk

10-31-2022, 07:45 PM	#7
IsaiahW Senior Member Join Date: Mar 2020 Drives: 2013 Subaru brz limited Location: Hampton va Posts: 105 Thanks: 15 Thanked 32 Times in 16 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Imma inspect the splines then retry again Sent from my iPhone using Tapatalk

11-03-2022, 09:22 PM	#9
IsaiahW Senior Member Join Date: Mar 2020 Drives: 2013 Subaru brz limited Location: Hampton va Posts: 105 Thanks: 15 Thanked 32 Times in 16 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Just an update I believe my diff is bad I took pictures with the vehicle rested down and discovered this! This is the same axle that seemed to have “popped” out. The axle shaft seals are new so what I believe is the diff/subframe risers are doing its job but a little too much. The right axle seems to keep coming out and putting stress on the bearing since the axles are sort of angled up now. Just a uneducated guess what you think? Because this only started after the risers were installed Sent from my iPhone using Tapatalk

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