Issue with rear suspension - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

jeffs42885 · 07-14-2020, 02:10 PM

So I have an issue with my 2015. I just put gram lights on. 18x8.5 +37 with factory TRD springs. 235/40/18.

Drivers side rubs. Took it to my friend who’s a suspension guy and we put it up on the alignment lift. We noticed that the drivers side sticks out a little more than the passenger side. And he said the tow could be off.

I’m starting to think this car was in an accident and the former seller didn’t disclose. Car fax was clean. Also, had the suspension looked at. No signs of damage. Anything bent. Subframe is okay. Etc. my friend suggested something along the lines of taking it apart. Putting it back together and seeing if that could possibly fix the issue. I’m not a suspension guy so any feedback is appreciated!

Here’s the pics.

[IMG]https://uploads.tapatalk-cdn.com/20200714/8243f2734317c2d58223939***428aea.jpg[/IMG]

Sent from my iPhone using Tapatalk

humfrz · 07-14-2020, 02:41 PM

Good looking car!

Would a spacer make it better or worse -

LimitedSlip · 07-14-2020, 02:48 PM

How about verifying the offset on all of the new wheels? Actually measure it just on the chance that you received one that was not what you ordered.

jeffs42885 · 07-14-2020, 03:48 PM

Quote:

Originally Posted by LimitedSlip

How about verifying the offset on all of the new wheels? Actually measure it just on the chance that you received one that was not what you ordered.

Yeah, I did. Stamped +37 18x8.5

Also OEM wheels look similar just don’t rub

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JesseG · 07-14-2020, 05:48 PM

First of all, your car looks bada$$

Secondly, did you measure the offset of each wheel? Like physically measure not go by the stamping on the wheel. I’m not exactly sure how you go about doing that accurately though.

Did you notice anything before switching to the new wheels?

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jeffs42885 · 07-14-2020, 06:04 PM

Quote:

Originally Posted by JesseG

First of all, your car looks bada$$

Secondly, did you measure the offset of each wheel? Like physically measure not go by the stamping on the wheel. I’m not exactly sure how you go about doing that accurately though.

Did you notice anything before switching to the new wheels?

Sent from my iPhone using Tapatalk

I didn’t. But I put the stock ones on and it’s the same

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Decep · 07-14-2020, 10:35 PM

That seems like a huge difference from that pic. /subbed

humfrz · 07-15-2020, 12:51 AM

Have you tried rotating them front to back (to see if one rim/tire is whacked out)?

jeffs42885 · 07-15-2020, 09:52 AM

Quote:

Originally Posted by humfrz

Have you tried rotating them front to back (to see if one rim/tire is whacked out)?

I didn’t but like I said, on the stock wheels and tires there’s still a difference.

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BigTuna · 07-15-2020, 09:56 AM

What were the alignment specs? Do you have adjustable lower control arms?

It could just be the angle, but the drivers side wheel looks like it has more camber. The rear caber is not adjustable on the car so it either has adjustable LCAs or something is bent.

jeffs42885 · 07-15-2020, 11:22 AM

Quote:

Originally Posted by BigTuna

What were the alignment specs? Do you have adjustable lower control arms?

It could just be the angle, but the drivers side wheel looks like it has more camber. The rear caber is not adjustable on the car so it either has adjustable LCAs or something is bent.

Stock suspension other than the TRD springs. Nothing looks bent.

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Grady · 07-15-2020, 01:25 PM

I would take everything apart and check all components. Also check subframe mounts to car. Previous owner may have curbed it. If all looks good you. May be able to get things to line up with the Whitline adjustable upper mounts and lower adjustable control arms. Move upper mount all the way out on the left and all the way in on the right, then adjust alignment with the lower.

CrowsFeast · 07-15-2020, 03:22 PM

How close to rubbing is the passenger side? Every manufactured part has tolerances (however tight those may be). When the sub-frame is mounted it can and will shift slightly to one side or the other as well.

You might just have picked a setup that is so tight it could fit on some cars and not on others. If you loosen the sub-frame and adjust it (or remove to inspect and then reinstall) then you may find that they no longer rub driving straight, but then rub when you corner (movement in the rubber sub-frame bushings).

jeffs42885 · 07-16-2020, 10:30 AM

Quote:

Originally Posted by Grady

I would take everything apart and check all components. Also check subframe mounts to car. Previous owner may have curbed it. If all looks good you. May be able to get things to line up with the Whitline adjustable upper mounts and lower adjustable control arms. Move upper mount all the way out on the left and all the way in on the right, then adjust alignment with the lower.

That’s my plan in the fall.

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07-14-2020, 02:10 PM	#1
jeffs42885 Senior Member Join Date: Jul 2013 Drives: Posts: 134 Thanks: 1 Thanked 14 Times in 13 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Issue with rear suspension So I have an issue with my 2015. I just put gram lights on. 18x8.5 +37 with factory TRD springs. 235/40/18. Drivers side rubs. Took it to my friend who’s a suspension guy and we put it up on the alignment lift. We noticed that the drivers side sticks out a little more than the passenger side. And he said the tow could be off. I’m starting to think this car was in an accident and the former seller didn’t disclose. Car fax was clean. Also, had the suspension looked at. No signs of damage. Anything bent. Subframe is okay. Etc. my friend suggested something along the lines of taking it apart. Putting it back together and seeing if that could possibly fix the issue. I’m not a suspension guy so any feedback is appreciated! Here’s the pics. [IMG]https://uploads.tapatalk-cdn.com/20200714/8243f2734317c2d58223939***428aea.jpg[/IMG] Sent from my iPhone using Tapatalk

07-14-2020, 10:35 PM	#7
Decep Senior Member Join Date: May 2017 Drives: 2013 FR-S Series 10 Location: CA Posts: 1,073 Thanks: 172 Thanked 497 Times in 326 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	That seems like a huge difference from that pic. /subbed __________________ 2013 FR-S 10 Series ~75k (SOLD) RCE SS-1 Coilovers Corsa Catback Edelbrock Supercharger installed @ 50k

07-15-2020, 09:56 AM	#10
BigTuna Senior Member Join Date: Jun 2015 Drives: 2013 WRB BRZ Location: Ohio Posts: 672 Thanks: 258 Thanked 477 Times in 275 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	What were the alignment specs? Do you have adjustable lower control arms? It could just be the angle, but the drivers side wheel looks like it has more camber. The rear caber is not adjustable on the car so it either has adjustable LCAs or something is bent. __________________ 2013 WRB "Build" Thread

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07-14-2020, 02:41 PM	#2
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,062 Thanks: 29,126 Thanked 32,202 Times in 16,572 Posts Mentioned: 709 Post(s) Tagged: 2 Thread(s)	Good looking car! Would a spacer make it better or worse -

07-14-2020, 02:48 PM	#3
LimitedSlip Senior Citizen Member Join Date: Jul 2018 Drives: Then-1977 Celica GT Now-2017 860SE Location: In A Galaxy Far Far Away Posts: 393 Thanks: 145 Thanked 385 Times in 201 Posts Mentioned: 12 Post(s) Tagged: 1 Thread(s)	How about verifying the offset on all of the new wheels? Actually measure it just on the chance that you received one that was not what you ordered.

07-14-2020, 05:48 PM	#5
JesseG Senior Member Join Date: Aug 2019 Drives: 2016 Scion FR-S Location: Dallas Posts: 806 Thanks: 2,685 Thanked 393 Times in 266 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	First of all, your car looks bada$$ Secondly, did you measure the offset of each wheel? Like physically measure not go by the stamping on the wheel. I’m not exactly sure how you go about doing that accurately though. Did you notice anything before switching to the new wheels? Sent from my iPhone using Tapatalk

07-15-2020, 12:51 AM	#8
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,062 Thanks: 29,126 Thanked 32,202 Times in 16,572 Posts Mentioned: 709 Post(s) Tagged: 2 Thread(s)	Have you tried rotating them front to back (to see if one rim/tire is whacked out)?

07-15-2020, 03:22 PM	#13
CrowsFeast Senior Member Join Date: Jun 2019 Drives: 2013 BRZ Sport-Tech Location: Toronto Posts: 354 Thanks: 184 Thanked 179 Times in 121 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	How close to rubbing is the passenger side? Every manufactured part has tolerances (however tight those may be). When the sub-frame is mounted it can and will shift slightly to one side or the other as well. You might just have picked a setup that is so tight it could fit on some cars and not on others. If you loosen the sub-frame and adjust it (or remove to inspect and then reinstall) then you may find that they no longer rub driving straight, but then rub when you corner (movement in the rubber sub-frame bushings).

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