REAR END CLUNK/RATTLE - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

fidel_1ss · 09-13-2022, 06:14 PM

I purchased a 2015 1SS M6 a couple months ago, completely stock and well taken care of. Soon as I had time I installed new shocks all around with lowering springs. Eibach parts for all of it. About a week later i started getting a clunking noise coming from the back whenever going over small or medium bumps. Or when i pulled into my driveway which is about 1/2” difference from the road. I pulled my rear seats down and it gets louder. I’ve checked every single nut and bolt in my rear suspension.
Starting last week I started getting a vibration in any gear going 75 or over. It only happens when I start accelerating as the car starts shaking but it only happens sometimes. Earlier today I did a pull and flew past 75 with ease. I let go of the gas for about 6 seconds and once i applied it some, the vibrations started. I’m extremely frustrated as it takes the joy out of driving it knowing those noises are there.

hunter1660 · 09-13-2022, 07:24 PM

Any play in the carrier bearing on drive shaft?

fidel_1ss · 09-13-2022, 08:36 PM

i have not checked the carrier bearing. i haven’t seen that as being a cause. but i’ll look into that as soon as i can

HyperV117 · 09-14-2022, 12:54 PM

With the vibrations I would make sure you torqued those wheels back correctly. I doubt anything is going on the drive shaft at this point. As far as the clunking chances are the car settled on those new springs and you are hearing the top rings touching. They sell rubber isolators that make it better.

fidel_1ss · 09-14-2022, 08:06 PM

wheels are torque to spec. the springs came with isolators on them so that’s not my issue. i can describe the clunking as if the door wasn’t closed all the way so it just bangs around on the latch. that’s my best description

hrpiii · 09-15-2022, 07:03 AM

Doesn't sound like those springs are setting good and solid. ....so you only hear it when you go over a bump or something and has to engage those shocks/springs..... hmmmmm. Or could be a cradle/control arm bushing arm is split to give the vibration. So you could potential have two issues.

Before I installed my coilovers, I would hear that type of noise from my back left spring (lowering springs) on occasion, but did not have any vibration.

fidel_1ss · 09-15-2022, 08:42 AM

yes the sound didn’t start until after the springs were installed. it’s coming from the right side of the car. i can only hear it when the right side hits a bump or when i pull out of my driveway and the right rear tire hits the road

SIM GhostrdrZ · 09-15-2022, 08:59 AM

I had a bad cradle mount bushing in my zl1. Put solids in and it went away. Couldn’t tell bushing was bad until I lifted and put pressure on it. Then I could see the forward left and right acted differently to similar movements. But so many different bushings/arms in the rear you’ve gotta lift it and investigate.

morepowerjoe · 09-15-2022, 03:28 PM

Going out on a limb here but do you think that one of your axles just craped out due to the drop?

fidel_1ss · 09-15-2022, 07:37 PM

springs have been on for about 6 months now. i haven’t had an issue with anything major. i just did my two rear wheel bearings a couple weeks ago. the vibration started around the same time

morepowerjoe · 09-16-2022, 12:30 AM

Quote:

Originally Posted by fidel_1ss

springs have been on for about 6 months now. i haven’t had an issue with anything major. i just did my two rear wheel bearings a couple weeks ago. the vibration started around the same time

How much of a drop did you get and how many miles are on your current axles?

TheFlyingBananaSS · 09-16-2022, 07:10 AM

Check all suspension hardware, especially the har d to get to ones. I had almost same issue. It was a bolt that backed out. Otherwise I would look into those springs you put in.

1JEWLDSSRS · 09-16-2022, 08:35 AM

Just another shot in the dark, but when we installed my Pfadt springs in my Camaro, the instructions showed and stated that on the top portion of the springs where the coils end is supposed to face the "center" of the car. I'm guessing so that they sit correctly in the upper isolators, if the camaro has them?? That could cause some minor movement if they are not seated correctly. I know my mustang I had there were isolators in the upper suspension where the springs sat.

fidel_1ss · 09-16-2022, 09:26 AM

Quote:

Originally Posted by morepowerjoe

How much of a drop did you get and how many miles are on your current axles?

I did a 1.4 rear and a 1.1 in the front. if they haven’t been changed, then they’re stock. so about 80k miles. i bought the car with 65k on it

09-13-2022, 06:14 PM	#1
fidel_1ss Drives: 2015 1SS Camaro Join Date: Apr 2022 Location: Illinois Posts: 13	REAR END CLUNK/RATTLE I purchased a 2015 1SS M6 a couple months ago, completely stock and well taken care of. Soon as I had time I installed new shocks all around with lowering springs. Eibach parts for all of it. About a week later i started getting a clunking noise coming from the back whenever going over small or medium bumps. Or when i pulled into my driveway which is about 1/2” difference from the road. I pulled my rear seats down and it gets louder. I’ve checked every single nut and bolt in my rear suspension. Starting last week I started getting a vibration in any gear going 75 or over. It only happens when I start accelerating as the car starts shaking but it only happens sometimes. Earlier today I did a pull and flew past 75 with ease. I let go of the gas for about 6 seconds and once i applied it some, the vibrations started. I’m extremely frustrated as it takes the joy out of driving it knowing those noises are there.

09-13-2022, 07:24 PM	#2
hunter1660 Drives: 2011ss/rs camaro Join Date: Sep 2011 Location: florida Posts: 1,261	Any play in the carrier bearing on drive shaft? __________________ . OBX LTH,Rotofab,Magnuson Heartbeat.AEM wideband, HP Tuners

09-14-2022, 12:54 PM	#4
HyperV117 Drives: 2010 Camaro 1SS Join Date: Nov 2015 Location: CA Posts: 358	With the vibrations I would make sure you torqued those wheels back correctly. I doubt anything is going on the drive shaft at this point. As far as the clunking chances are the car settled on those new springs and you are hearing the top rings touching. They sell rubber isolators that make it better. __________________

09-15-2022, 03:28 PM	#9
morepowerjoe Drives: 2012 Chevrolet Camaro l99 Join Date: Aug 2020 Location: Austin, TX Posts: 2,105	Going out on a limb here but do you think that one of your axles just craped out due to the drop? __________________ DSS FX Forged Pistons, Eagle ESP L19 Forged Rods, ARP Head and Main Studs, TSP PRC 260 CNC Ported Heads milled .030, Cometic .040 Head Gaskets, GPI SS3 VVT Camshaft, GM Performance Racing Lifters, CHE Trunnions , Molly Pushrods, Melling 10355HV Oil Pump, Cold Air Inductions CAI, Fast LSXR Intake Manifold, Nick Williams 103 TB, TSP 1 7/8" Longtubes with 3" TSP Exhaust, ZL1 Fuel Pump, Mishimoto Radiator, Mishimoto Oil Cooler, Tru Cool 40k Tranny Cooler, 3600 Circle D Converter, Fluid Dynamics Balancer Build Thread https://www.camaro5.com/forums/showthread.php?t=609817

09-16-2022, 07:10 AM	#12
TheFlyingBananaSS Evil Genius of Chevrolet Drives: 2017 Z06, 2019 XTS, 2013 SS Join Date: Feb 2017 Location: New York Posts: 3,260	Check all suspension hardware, especially the har d to get to ones. I had almost same issue. It was a bolt that backed out. Otherwise I would look into those springs you put in. __________________ GPI SS2 VVT cam, ECS Novi 1500 supercharger, Corsa Extreme, Detroit Speed and BMR suspension, Circle D triple disc, Melling oil pump, LS2 chain tensioner, ATI 10% UD, DSX E85 kit, High Energy coils, BTR springs, LS2 Lifter trays, Titanium retainers, hardened push rods, FIC 1000 injectors, ZL1 pump, Mighty Mouse catch can, AEM gauges, Tial BOV, Richmond 3.91 gears, Custom gauge bezels, Speed Engineering headers, Stainless Works HF cats, DSX Aux pump, 710rwhp on E85.

09-13-2022, 08:36 PM	#3
fidel_1ss Drives: 2015 1SS Camaro Join Date: Apr 2022 Location: Illinois Posts: 13	i have not checked the carrier bearing. i haven’t seen that as being a cause. but i’ll look into that as soon as i can

09-14-2022, 08:06 PM	#5
fidel_1ss Drives: 2015 1SS Camaro Join Date: Apr 2022 Location: Illinois Posts: 13	wheels are torque to spec. the springs came with isolators on them so that’s not my issue. i can describe the clunking as if the door wasn’t closed all the way so it just bangs around on the latch. that’s my best description

09-15-2022, 07:03 AM	#6
hrpiii AKA "Beefcake" Drives: 2023 ZL1 Sharkskin Join Date: Oct 2009 Location: Indy Posts: 8,529	Doesn't sound like those springs are setting good and solid. ....so you only hear it when you go over a bump or something and has to engage those shocks/springs..... hmmmmm. Or could be a cradle/control arm bushing arm is split to give the vibration. So you could potential have two issues. Before I installed my coilovers, I would hear that type of noise from my back left spring (lowering springs) on occasion, but did not have any vibration.

09-15-2022, 08:42 AM	#7
fidel_1ss Drives: 2015 1SS Camaro Join Date: Apr 2022 Location: Illinois Posts: 13	yes the sound didn’t start until after the springs were installed. it’s coming from the right side of the car. i can only hear it when the right side hits a bump or when i pull out of my driveway and the right rear tire hits the road

09-15-2022, 08:59 AM	#8
SIM GhostrdrZ Drives: ‘14 Z/28 ‘14 ZL1 M6 vert Join Date: Jul 2015 Location: Ohio Posts: 1,283 View My Garage	I had a bad cradle mount bushing in my zl1. Put solids in and it went away. Couldn’t tell bushing was bad until I lifted and put pressure on it. Then I could see the forward left and right acted differently to similar movements. But so many different bushings/arms in the rear you’ve gotta lift it and investigate.

09-15-2022, 07:37 PM	#10
fidel_1ss Drives: 2015 1SS Camaro Join Date: Apr 2022 Location: Illinois Posts: 13	springs have been on for about 6 months now. i haven’t had an issue with anything major. i just did my two rear wheel bearings a couple weeks ago. the vibration started around the same time

09-16-2022, 08:35 AM	#13
1JEWLDSSRS Drives: 2011 SS-RS Join Date: May 2011 Location: FLORIDA Posts: 11,435	Just another shot in the dark, but when we installed my Pfadt springs in my Camaro, the instructions showed and stated that on the top portion of the springs where the coils end is supposed to face the "center" of the car. I'm guessing so that they sit correctly in the upper isolators, if the camaro has them?? That could cause some minor movement if they are not seated correctly. I know my mustang I had there were isolators in the upper suspension where the springs sat. __________________ TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.