370z possible rear suspension issue

Henryz34 · 08-04-2018, 12:23 AM

I have a 2017 370z base model, with minor suspension mods as follows: 20mm spacers all around, Swift lowering springs, and rear camber arms.

There seems to be a small suspension issue in the rear. Whenever maneuvering at low speeds or reversing, the rear right wheel feels as if its going over a bump, even if the path is perfectly level.

Something feels loose or uneven, even though everything is torqued down tight. There is a minor clunking noise that occasionally happens along with the uneven bump feeling. Sounds like a deep clunking noise.

Any ideas as to what the problem is and how to fix it?

Rusty · 08-04-2018, 12:55 AM

Jack the car up. Take a pry bar and try to move the cambers arms at the joints. Do this with the other arms too. Should be no play. Who's camber arms you have? Also. Grab the tire at the 12 and 6 position. Push the top in and pull the bottom, and reverse the motion. Should be no play. Now Grab the tire at the 3 and 9 position. Do the samething. Push/pull. Should be no play. IF you have play. Get someone to help you. They have to do the push/pull. While you look to see where the play is coming from.

Henryz34 · 08-04-2018, 02:32 PM

Thanks for the reply! I jacked it up and did what you described, there was absolutely no play anywhere. The camber arms were solid in place as well, theyre from Voodoo13. I also retorqued most of the suspension, its weird, the uneven feeling only occurs at low speeds when im in reverse backing out or going slow. It smooths out once im going more than 10 mph+ or so
any other ideas as to what it could be?

bpchaos · 08-07-2018, 05:17 PM

I've had the same issue, and I can't seem to diagnose it either. It's a pretty random low-speed clunking noise coming from the back right as well. I thought it was my rear endlinks going, but I took it apart and everything seems to be fine. Didn't solve the problem though.

Is something binding?

Rusty · 08-07-2018, 08:56 PM

2 other things to check. Your diff bushing. Look and see if there is any black streaks on the diff cover. If there is. The diff bushing has failed. The other thing to check is the axle nut on the hub. Those have been known to cause noise. Think there might be a TSB on it.

bpchaos · 08-08-2018, 03:03 PM

Quote:

Originally Posted by Rusty

2 other things to check. Your diff bushing. Look and see if there is any black streaks on the diff cover. If there is. The diff bushing has failed. The other thing to check is the axle nut on the hub. Those have been known to cause noise. Think there might be a TSB on it.

Diff bushing has already been dealt with - I have the Z1 urethane but I'll check again. Will also see if axle nut is doin' anything weird.

Henryz34 · 08-10-2018, 09:07 PM

give me a heads up bp if you end up finding out whats wrong with it, i can't seem to diagnose it either and its driving me crazy.

the car still handles great and is fine at higher speeds but low speed it clunks like crazy.

ValidusVentus · 08-29-2018, 07:12 PM

Sub'd for curiosity.

Check for an abnormal amount of rear toe, in or out. At ride height.

SouthArk370Z · 08-29-2018, 09:11 PM

Going by previous posts on this site, I think Rusty may be on the right track about it being an axle nut. It seems to be a fairly common problem with the same or similar symptoms to your's.

jchammond · 08-30-2018, 03:00 AM

Don’t forget about parking brake shoes inside rear brake rotors; inspect & keep them adjusted properly.

BGTV8 · 08-30-2018, 03:21 AM

Quote:

Originally Posted by Rusty

2 other things to check. Your diff bushing. Look and see if there is any black streaks on the diff cover. If there is. The diff bushing has failed. The other thing to check is the axle nut on the hub. Those have been known to cause noise. Think there might be a TSB on it.

Fix for axle click.clunk is below if this is actually what it turns out to be:

FIXED: Rear axle click clunk noise

jchammond · 08-30-2018, 03:57 AM

Quote:

Originally Posted by BGTV8

Fix for axle click.clunk is below if this is actually what it turns out to be:

FIXED: Rear axle click clunk noise

Good read; as i never experienced this with my 11' & over 90,000mi.
I may have heard more (if my ears weren't failing me).

08-04-2018, 12:23 AM	#1 (permalink)
Henryz34 Base Member Join Date: Jul 2017 Location: North Carolina Posts: 9 Drives: 2017 370z White M6 Rep Power: 8	370z possible rear suspension issue I have a 2017 370z base model, with minor suspension mods as follows: 20mm spacers all around, Swift lowering springs, and rear camber arms. There seems to be a small suspension issue in the rear. Whenever maneuvering at low speeds or reversing, the rear right wheel feels as if its going over a bump, even if the path is perfectly level. Something feels loose or uneven, even though everything is torqued down tight. There is a minor clunking noise that occasionally happens along with the uneven bump feeling. Sounds like a deep clunking noise. Any ideas as to what the problem is and how to fix it?

08-04-2018, 12:55 AM	#2 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,172 Drives: 2011 Nismo GM 6M Rep Power: 2684437	Jack the car up. Take a pry bar and try to move the cambers arms at the joints. Do this with the other arms too. Should be no play. Who's camber arms you have? Also. Grab the tire at the 12 and 6 position. Push the top in and pull the bottom, and reverse the motion. Should be no play. Now Grab the tire at the 3 and 9 position. Do the samething. Push/pull. Should be no play. IF you have play. Get someone to help you. They have to do the push/pull. While you look to see where the play is coming from. old guy and envisous like this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html Last edited by Rusty; 08-04-2018 at 01:00 AM.

08-07-2018, 08:56 PM	#5 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 68 Posts: 35,172 Drives: 2011 Nismo GM 6M Rep Power: 2684437	2 other things to check. Your diff bushing. Look and see if there is any black streaks on the diff cover. If there is. The diff bushing has failed. The other thing to check is the axle nut on the hub. Those have been known to cause noise. Think there might be a TSB on it. SouthArk370Z and envisous like this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

08-29-2018, 07:12 PM	#8 (permalink)
ValidusVentus Enthusiast Member Join Date: Jun 2011 Location: Washington State Posts: 400 Drives: #18 Z34 Rep Power: 23	Sub'd for curiosity. Check for an abnormal amount of rear toe, in or out. At ride height. __________________ Mods: Dedicated caged track car, lots of things. \|\|\| Valkyrie Autosport \|\|\|

08-29-2018, 09:11 PM	#9 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Going by previous posts on this site, I think Rusty may be on the right track about it being an axle nut. It seems to be a fairly common problem with the same or similar symptoms to your's. Rusty likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

08-04-2018, 02:32 PM	#3 (permalink)
Henryz34 Base Member Join Date: Jul 2017 Location: North Carolina Posts: 9 Drives: 2017 370z White M6 Rep Power: 8	Thanks for the reply! I jacked it up and did what you described, there was absolutely no play anywhere. The camber arms were solid in place as well, theyre from Voodoo13. I also retorqued most of the suspension, its weird, the uneven feeling only occurs at low speeds when im in reverse backing out or going slow. It smooths out once im going more than 10 mph+ or so any other ideas as to what it could be?

08-07-2018, 05:17 PM	#4 (permalink)
bpchaos Base Member Join Date: Oct 2016 Location: Los Angeles, CA Posts: 74 Drives: G37S (370z+ seats) Rep Power: 3364	I've had the same issue, and I can't seem to diagnose it either. It's a pretty random low-speed clunking noise coming from the back right as well. I thought it was my rear endlinks going, but I took it apart and everything seems to be fine. Didn't solve the problem though. Is something binding?

08-10-2018, 09:07 PM	#7 (permalink)
Henryz34 Base Member Join Date: Jul 2017 Location: North Carolina Posts: 9 Drives: 2017 370z White M6 Rep Power: 8	give me a heads up bp if you end up finding out whats wrong with it, i can't seem to diagnose it either and its driving me crazy. the car still handles great and is fine at higher speeds but low speed it clunks like crazy.

08-30-2018, 03:00 AM	#10 (permalink)
jchammond A True Z Fanatic Join Date: Nov 2014 Location: South Carolina Age: 58 Posts: 15,204 Drives: 13’ 370Z TS 7A/T Rep Power: 2684394	Don’t forget about parking brake shoes inside rear brake rotors; inspect & keep them adjusted properly. __________________ MazWorx built long block \| FI-TT-100 Stage 2.75 \| IPT built 7A/T http://www.the370z.com/members-370z-...s-musings.html

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