Notices
C7 General Discussion General C7 Corvette Discussion not covered in Tech
Sponsored by:
Sponsored by:

Help! Suspension noise

 
Old 02-01-2015, 10:24 PM
  #1  
A471133
CF Senior Member
Thread Starter
 
Member Since: Apr 2014
Location: SATX TX
Posts: 240
Received 60 Likes on 34 Posts
Default Help! Suspension noise

Hoping the foum can help me here, you guys have come through in the past.

To preempt the questions of "why don't you bring it to the dealer", I'm stationed in the middle of nowhere right now, nearest Chevy dealer is 2+ hours drive away. Last time I used them for a seat creaking noise, they had my car for 4 weeks and ended up replacing the entire seat since they couldn't figure out the noise.

So onto the issue: Car is 14 Z51 MT, approx 8K miles. About 500 miles ago, started to hear a "clunk/clank" type of sound from driver's rear, thought it was me going crazy, ignored it. My drive to work consists of 20mins highway, and then 5 miles of not so smooth roads. The last few weeks, the noise has increased in frequency.

Particulars on the noise: Clunk/clank, localized to driver's rear. Only happens on uneven road/bumpy roads. No noise over speed bumps or large bumps, it seems to happen only on smaller ones. Only clunks once per bump, speed of noise is not effected by vehicle speed. If both rear wheels go over the bump, no noise. Happens at low speeds <40mph. No change in the car's handling/acceleration. Doesn't matter if I'm turning or going straight, always from the driver's rear corner.


After extensive googling, I've done the following to try find the source:
-pressed down on the corners to test shocks, unable to recreate noise
-put on lift, tried to pull and move all suspension parts, unable to find looseness/unable to replicate noise. Wiggled the heck out of each wheel, no movement, no noise
-on ramps, repeated above with suspension loaded and unloaded, unable to find loose parts or noise
-changed rear sway bar end links for new ones, no change in noise
-ensured axle nuts are tight. Seems the they changed this from the C6 years, axle nut is now 36mm and staked in a groove so it is secure
-Left rear wheeliner removed, inspected the brake ducts, pump for ELSD, fuel filler appartus, no evidence of anything to cause the noise
-rear bumper removed, ensured exhaust hangers/connections tight, all wires/cables behind rear bumper secured without movement


At this point, I am at a loss of what could be making the noise. My only thought are that its a bushing in one of the control arms, the factory "lowering" bolt clanking against something, or the shock going bad.

Hoping someone can shine a light into what could be going on. This is the first car I've had with the leaf spring suspension.
A471133 is offline  
Old 02-01-2015, 11:02 PM
  #2  
beachcomber
CF Senior Member
 
beachcomber's Avatar
 
Member Since: Sep 2010
Location: Prosper TX
Posts: 1,586
Received 46 Likes on 42 Posts
Default

You tried everything and more that I can think of. Hope you get this sorted out or someone can provide you assistance on what to look for.

Thank you for your service!
beachcomber is offline  
Old 12-01-2015, 02:00 PM
  #3  
Zajac
CF Senior Member
 
Member Since: Jul 2014
Posts: 222
Received 4 Likes on 3 Posts
Default solid clunking noise in rear

I know this is an old post but I was searching for similar clunking sounds in the rear.

I think my 2015 base C7, which has been lowered on factory bolts all the way since new, is now doing the exact same thing as described. As the OP noted, it does not happen with both rear wheels going over a bump. For me, it mainly happens when making a slow left or right 90 deg turn in a neighborhood where there are water gutter/grooves perpendicular to the street at the corner intersection.

This clunking noise did not happen before with my lowered base C7 and it did not occur after I added the front/rear Z51 sway bars. It starting occurring after I switched out the rear Z51 sway bar for the thicker FE4 Mag ride rear sway bar and also added the Z51 non-mag ride shocks at all 4 corners at the same time.

I am just guessing that it has something to do with the Mag ride larger sway bar.

Ideas?

Did the OP solve this problem?

Does not occur when tracking the car.
Zajac is offline  
Old 12-01-2015, 02:01 PM
  #4  
A471133
CF Senior Member
Thread Starter
 
Member Since: Apr 2014
Location: SATX TX
Posts: 240
Received 60 Likes on 34 Posts
Default

Sorry, old post. Problem was solved. Ended up being the rear rotor on the pass side. Somehow rotor surface and rotor center mount has separated. Dealer replaced under warranty.
A471133 is offline  
Old 04-13-2018, 01:23 PM
  #5  
robertf97
CF Senior Member
Support Corvetteforum!
 
robertf97's Avatar
 
Member Since: Oct 2008
Location: Nashville, TN
Posts: 601
Received 5 Likes on 5 Posts
Default

Originally Posted by A471133 View Post
Sorry, old post. Problem was solved. Ended up being the rear rotor on the pass side. Somehow rotor surface and rotor center mount has separated. Dealer replaced under warranty.
Thanks for updating this, I am having the same issue and now know where to look!
robertf97 is offline  
Old 12-21-2018, 11:26 PM
  #6  
Matthewstorm
CF Senior Member
 
Matthewstorm's Avatar
 
Member Since: Oct 2017
Location: North Carolina
Posts: 1,209
Received 127 Likes on 111 Posts
Default

Originally Posted by robertf97 View Post
Thanks for updating this, I am having the same issue and now know where to look!
When he said rotor what rotor is he talking about?
Matthewstorm is offline  
Old 12-27-2018, 04:50 AM
  #7  
theredkni463
Junior Member
 
Member Since: Dec 2018
Location: las vegas
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by Matthewstorm View Post

When he said rotor what rotor is he talking about?
I have no idea, i have the same symptoms as OP and have done the same things as he has. mine is just random clunking but upon inspection, my left driver side rotor (where the clunking for me was coming from) seem to have a ever so slight crack running around the rotor. im not sure if this has to do with what OP said. also, if i park my car and use only the E-brake to park, i can replicate the sound my pushing the rear driver side tire with my feet and it "clunks" loudly and same as what i am hearing during low speeds. the passenger side does not do this. im not sure why... maybe the rotors are my problem..?

Last edited by theredkni463; 12-27-2018 at 05:03 AM.
theredkni463 is offline  
Old 01-05-2019, 09:48 PM
  #8  
theredkni463
Junior Member
 
Member Since: Dec 2018
Location: las vegas
Posts: 3
Likes: 0
Received 0 Likes on 0 Posts
Default

any update OP about the rotors? im very curious on what you mean by the clunking noise came from the rotors...
theredkni463 is offline  
Old 06-13-2019, 12:19 AM
  #9  
Vette_17
CF Member
 
Member Since: Apr 2015
Posts: 58
Received 14 Likes on 7 Posts
Default

i will check this on my car. also have a clicking noise
Vette_17 is offline  
Old 06-13-2019, 04:32 PM
  #10  
rrepp
CF Senior Member
 
Member Since: Apr 2018
Location: Orange County Ca
Posts: 166
Received 52 Likes on 40 Posts
Default

I believe he's speaking about his rear brake rotors, which on 2014's and some 2015's were 2 piece rotors and there was a problem with the two piece rotors. There was a notice to gm dealers to replace two piece rotors with one piece rotors. Newer models came new with one piece brake rotors.
rrepp is offline  
Old 06-13-2019, 07:03 PM
  #11  
Thunder22
CF Senior Member
 
Thunder22's Avatar
 
Member Since: May 2004
Location: NY/LI/NJ
Posts: 27,247
Received 1,348 Likes on 914 Posts
Default

Another 4 year old thread, why does this keep happening?
Thunder22 is online now  
Old 06-14-2019, 12:28 AM
  #12  
Avanti
CF Senior Member
 
Avanti's Avatar
 
Member Since: Mar 2001
Location: Bonneville Salt Flats, 223mph Aug. '04
Posts: 6,259
Received 725 Likes on 522 Posts
Default

...because ometimes the same issues keep happening and search brings them up.
Avanti is offline  

Thread Tools
Search this Thread
Quick Reply: Help! Suspension noise


Contact Us - About Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: