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

toeout · 02-26-2014, 01:06 AM

I've been chasing clunking from rear suspension. Discovered today that both rear shocks make contact with the lower control arms (SPC). Could this be loud enough to be heard inside the car?

mav1178 · 02-26-2014, 01:24 AM

Easy way to tell: sit in car, have someone lightly tap rear LCA with a hammer.

Or trust my word: yes you'll hear it. That's the cause of the noise.

-alex

Cjymiller · 02-26-2014, 01:35 AM

Its like the manufacturer didn't even test fit...

OICU812 · 02-26-2014, 01:49 AM

Dr. Dremel would fix those LCA right up.

Jeff@Racer X Fab · 02-26-2014, 06:04 AM

Did you have the control arms first or the coilovers? At first glance the bottom of the coilover seems very wide.

toeout · 02-26-2014, 10:21 AM

That's what I thought. I just wanted a second opinion in case I'm making stuff up from desperation.

As far as the fix goes, at first I thought flattening that corner on the shock, but the problem is that the sway bar end link rubber bushing twists the control arm forward, till the shock makes contact. All the other bushings are either pillowball or spherical bearing ( on the shock ). So even if I file some of that corner off, it will still make contact, due to the endlink bushing twisting it.

On stock control arms, the inner bushing is rubber and won't allow the arm to twist. SPC arms have the pillow ball type inner bushing.

Quote:

Originally Posted by racerx1715

Did you have the control arms first or the coilovers? At first glance the bottom of the coilover seems very wide.

I got the shocks and the arms at the same time. The bottom of the shock is big and of course the corner of that hex is exactly at the narrowest spot.

I was actually perusing your website yesterday, because I think the heim joint endlinks would keep the arm from twisting forward like that. Do you have the rear endlinks in stock?

Jeff@Racer X Fab · 02-27-2014, 06:13 AM

Quote:

Originally Posted by toeout

That's what I thought. I just wanted a second opinion in case I'm making stuff up from desperation.

As far as the fix goes, at first I thought flattening that corner on the shock, but the problem is that the sway bar end link rubber bushing twists the control arm forward, till the shock makes contact. All the other bushings are either pillowball or spherical bearing ( on the shock ). So even if I file some of that corner off, it will still make contact, due to the endlink bushing twisting it.

On stock control arms, the inner bushing is rubber and won't allow the arm to twist. SPC arms have the pillow ball type inner bushing.

I got the shocks and the arms at the same time. The bottom of the shock is big and of course the corner of that hex is exactly at the narrowest spot.

I was actually perusing your website yesterday, because I think the heim joint endlinks would keep the arm from twisting forward like that. Do you have the rear endlinks in stock?

Yes, we keep stock of all our suspension parts. I think I saw your order come across yesterday.

supramkivtt2jz · 02-27-2014, 12:19 PM

Quote:

Originally Posted by Cjymiller

Its like the manufacturer didn't even test fit...

They were designed to be used with the stock arms.

Cjymiller · 02-27-2014, 01:19 PM

Quote:

Originally Posted by supramkivtt2jz

They were designed to be used with the stock arms.

Ah you're right, I overlooked the fact he was on SPC since they look stock.

AZOOZ_95 · 01-21-2015, 02:47 PM

So what was the fix for the issue?

I'm having similar problems

toeout · 01-21-2015, 04:11 PM

The problem turned out to be shocks themselves. I spent ridiculous amount of time and effort installing the suspension pieces and taking them off again. Putting rubber sheets between various pieces trying to isolate the cause.

In the end it was the shocks and even knowing that ,we couldn't get the non-remote version to be quiet. My final solution was to have the shocks rebuilt to remote reservoir version and my suspension has been quiet from that point on. 7 months and 12K miles.

02-26-2014, 01:06 AM	#1
toeout Senior Member Join Date: Oct 2013 Drives: 2013 FR-S Location: Knoxville, TN Posts: 289 Thanks: 106 Thanked 172 Times in 71 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Clunking in rear suspension I've been chasing clunking from rear suspension. Discovered today that both rear shocks make contact with the lower control arms (SPC). Could this be loud enough to be heard inside the car?

01-21-2015, 02:47 PM	#10
AZOOZ_95 Middle Eastern 86 Join Date: Mar 2013 Drives: RED GT86 Location: Saudi Arabia Posts: 162 Thanks: 601 Thanked 17 Times in 13 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	So what was the fix for the issue? I'm having similar problems __________________

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02-26-2014, 01:24 AM	#2
mav1178 Senior Member Join Date: Apr 2013 Drives: 2005 Toyota Camry Location: 91745 Posts: 6,562 Thanks: 493 Thanked 6,093 Times in 3,029 Posts Mentioned: 95 Post(s) Tagged: 3 Thread(s)	Easy way to tell: sit in car, have someone lightly tap rear LCA with a hammer. Or trust my word: yes you'll hear it. That's the cause of the noise. -alex

02-26-2014, 06:04 AM	#5
Jeff@Racer X Fab Senior Member Join Date: Aug 2012 Drives: Subaru BRZ, Toyota MR2 Turbo Location: Lansing, MI Posts: 321 Thanks: 92 Thanked 340 Times in 135 Posts Mentioned: 23 Post(s) Tagged: 1 Thread(s)	Did you have the control arms first or the coilovers? At first glance the bottom of the coilover seems very wide.

01-21-2015, 04:11 PM	#11
toeout Senior Member Join Date: Oct 2013 Drives: 2013 FR-S Location: Knoxville, TN Posts: 289 Thanks: 106 Thanked 172 Times in 71 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	The problem turned out to be shocks themselves. I spent ridiculous amount of time and effort installing the suspension pieces and taking them off again. Putting rubber sheets between various pieces trying to isolate the cause. In the end it was the shocks and even knowing that ,we couldn't get the non-remote version to be quiet. My final solution was to have the shocks rebuilt to remote reservoir version and my suspension has been quiet from that point on. 7 months and 12K miles.

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