Rear suspension clunking noise. Help ): - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

dito · 10-12-2015, 04:16 PM

Hey guys so ever since i installed my pbm lca ive been getting a clicking or clunking noise in the rear. When i had coilovers it wasn't as bad but i still had the noise going uneven pavement or at an angle. I just got my airlift kit installed and now the sound is worse. I get a clunking noise on bumps and everything that isnt flat smooth pavement. The shop tighten all the struts and top hats so it might not be it. I just got an alignment and the shop showed me that my rear sway bar on the left side is pushed out a little bit more than my right. Could this be the problem? Thanks guys

jbailey8748 · 10-13-2015, 04:27 PM

Lowered?

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wtfrs · 10-19-2015, 02:16 AM

What psi are you driving at in the rear?

mav1178 · 10-19-2015, 11:41 AM

Clunking when driving can be one of 3 things:

1) loose coilover strut/center nut
2) loose LCA bolts/nuts
3) loose coilover assembly (top hats) or botton mount to LCA

Assuming no defects with your parts... your installer sucks.

-alex

jbailey8748 · 10-19-2015, 11:44 AM

Rear CV joints can make these noises too

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solidONE · 10-20-2015, 03:03 PM

Check and re-torque all the hardware that you touched during the install.

mav1178 · 10-20-2015, 06:57 PM

Quote:

Originally Posted by jbailey8748

Rear CV joints can make these noises too

Possibly, but usually axles have "click click" noises and it would increase with vehicle speed.

-alex

drift86 · 10-20-2015, 07:16 PM

Stock shocks? Stock shocks are prone to leak and cause a clunking sound over bumps. I've had mine replaced under warranty and know of several others with the same issue.

dito · 10-21-2015, 01:33 AM

i had the noise when i was on coilovers too. i started getting the noise after i got my lca installed by a shop that took 2~3 days to install -_-.... so im wonder what is the proper way to tighten the LCA nut and bolts. im driving on 41~43 psi front and 46~48 psi rear.

solidONE · 10-21-2015, 01:58 AM

Quote:

Originally Posted by dito

i had the noise when i was on coilovers too. i started getting the noise after i got my lca installed by a shop that took 2~3 days to install -_-.... so im wonder what is the proper way to tighten the LCA nut and bolts. im driving on 41~43 psi front and 46~48 psi rear.

WTF? that's a 1/2 hour job, maybe 1 hour "book" time. and those tire pressure are way too high. The most I would run, depending on the tire, is 40psi if I'm really trying to save my tires. Scion/Subaru recommends 35psi, IIRC.

Please name the shop that did the install.

dito · 10-21-2015, 04:27 AM

Quote:

Originally Posted by solidONE

WTF? that's a 1/2 hour job, maybe 1 hour "book" time. and those tire pressure are way too high. The most I would run, depending on the tire, is 40psi if I'm really trying to save my tires. Scion/Subaru recommends 35psi, IIRC.

Please name the shop that did the install.

haha my bad the psi are meant for the bags in the air suspension. and yeah the shop kept telling me to come back and forth to install and adjust

solidONE · 10-21-2015, 02:47 PM

Quote:

Originally Posted by dito

haha my bad the psi are meant for the bags in the air suspension. and yeah the shop kept telling me to come back and forth to install and adjust

PBM as in powered by max? I think I know what's up. lol The locking adjusters on these arms are HUGE. Jack up you car and have a look at where the LCA is connected to the subframe. see if there is any exposed or scored metal on both the subframe and the adjusters. If you find anything like that, then you have located the cause of the noise. haha

You know what? Take some pictures of the mounting points on the subframe/LCA and post them up and I'll show you exactly whats going on. Also, what is the rear camber specs? These arms have a huge range of adjustment. I'm assuming they're designed for "hella" camber adjustment. lmao

Which shop did the install?

mav1178 · 10-21-2015, 02:51 PM

Yup, your installer sucks.

Find someone else to fix your clunking issue.

8R6 · 10-21-2015, 07:03 PM

which shop did the work?

10-12-2015, 04:16 PM	#1
dito Senior Member Join Date: Mar 2015 Drives: SWP BRZ Location: Orange County Posts: 124 Thanks: 13 Thanked 14 Times in 8 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Rear suspension clunking noise. Help ): Hey guys so ever since i installed my pbm lca ive been getting a clicking or clunking noise in the rear. When i had coilovers it wasn't as bad but i still had the noise going uneven pavement or at an angle. I just got my airlift kit installed and now the sound is worse. I get a clunking noise on bumps and everything that isnt flat smooth pavement. The shop tighten all the struts and top hats so it might not be it. I just got an alignment and the shop showed me that my rear sway bar on the left side is pushed out a little bit more than my right. Could this be the problem? Thanks guys

10-20-2015, 03:03 PM	#6
solidONE Senior Member Join Date: Dec 2012 Drives: FR-S Whiteout Location: California Posts: 2,863 Thanks: 1,808 Thanked 790 Times in 611 Posts Mentioned: 42 Post(s) Tagged: 0 Thread(s)	Check and re-torque all the hardware that you touched during the install. __________________ Intent > Content cowardice is the mother of cruelty.

10-21-2015, 07:03 PM	#14
8R6 Senior Member Join Date: Jan 2014 Drives: FRS Location: SoCal Posts: 2,086 Thanks: 2,738 Thanked 1,338 Times in 746 Posts Mentioned: 30 Post(s) Tagged: 2 Thread(s)	which shop did the work? __________________ Team BRG inspire-usa My car build #8R6

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10-19-2015, 02:16 AM	#3
wtfrs Member Join Date: Sep 2015 Drives: 2014 Monogram Location: Nevada Posts: 72 Thanks: 2 Thanked 18 Times in 14 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	What psi are you driving at in the rear?

10-19-2015, 11:41 AM	#4
mav1178 Senior Member Join Date: Apr 2013 Drives: 2005 Toyota Camry Location: 91745 Posts: 6,562 Thanks: 493 Thanked 6,092 Times in 3,029 Posts Mentioned: 95 Post(s) Tagged: 3 Thread(s)	Clunking when driving can be one of 3 things: 1) loose coilover strut/center nut 2) loose LCA bolts/nuts 3) loose coilover assembly (top hats) or botton mount to LCA Assuming no defects with your parts... your installer sucks. -alex

10-20-2015, 07:16 PM	#8
drift86 Member Join Date: Sep 2012 Drives: GT86, 22 BRZ Location: Sydney Posts: 79 Thanks: 24 Thanked 80 Times in 23 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Stock shocks? Stock shocks are prone to leak and cause a clunking sound over bumps. I've had mine replaced under warranty and know of several others with the same issue.

10-21-2015, 01:33 AM	#9
dito Senior Member Join Date: Mar 2015 Drives: SWP BRZ Location: Orange County Posts: 124 Thanks: 13 Thanked 14 Times in 8 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	i had the noise when i was on coilovers too. i started getting the noise after i got my lca installed by a shop that took 2~3 days to install -_-.... so im wonder what is the proper way to tighten the LCA nut and bolts. im driving on 41~43 psi front and 46~48 psi rear.

10-21-2015, 02:51 PM	#13
mav1178 Senior Member Join Date: Apr 2013 Drives: 2005 Toyota Camry Location: 91745 Posts: 6,562 Thanks: 493 Thanked 6,092 Times in 3,029 Posts Mentioned: 95 Post(s) Tagged: 3 Thread(s)	Yup, your installer sucks. Find someone else to fix your clunking issue.

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