Thudding on acceleration/bumps - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

spadz93 · 08-31-2016, 11:19 AM

Putting my thread over here in hopes I get a little more input. Replaced trans and motor mounts and still no dice.

Edit: new update

http://www.camaro5.com/forums/showthread.php?t=462117

BandRcAMARO · 08-31-2016, 11:21 AM

could be sway bar links going bad or the bushings?

spadz93 · 08-31-2016, 11:30 AM

Welcoming that idea. Any good way to test aside from tearing it apart?

Jrichards73 · 09-04-2016, 06:29 PM

Shift into first then into reverse, if you hear a thud each way the differential bolts are loose. Specifically on the passenger side as the oval bolt hole in the subframe is vertical on that side. You will also be able to see the right axle jump up or down from underneath it. As you lock down parts of the drivetrain you will start finding things loose, where the factory bushes were absorbing it, now that it is polly, solid, or whatever, it is transfering that torsion somewhere else.

spadz93 · 09-05-2016, 03:50 PM

Quote:

Originally Posted by Jrichards73

Shift into first then into reverse, if you hear a thud each way the differential bolts are loose. Specifically on the passenger side as the oval bolt hole in the subframe is vertical on that side. You will also be able to see the right axle jump up or down from underneath it. As you lock down parts of the drivetrain you will start finding things loose, where the factory bushes were absorbing it, now that it is polly, solid, or whatever, it is transfering that torsion somewhere else.

I'm assuming that's just a quick re-torque and go? Or at least hopefully lol, maybe support the diff, take the bolt out and loctite it

Also note the thumping is coming from the front and only over bumps and moderate accel
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3rdgen3 · 09-05-2016, 04:22 PM

If youre hearing thuds over bumps in the front id bet the stock upper strut mounts have seen better days. Being a 2010 did you reuse the stock strut mounts when you replaced the struts or did you upgrade to some FE4 strut mounts?

Over time the strut mounts can develop some play and i know the early FE3 cars TONS of people complained about thuds over bumps and that was the case!

Jrichards73 · 09-05-2016, 04:31 PM

It is a retorque, but I added Delrin bushings while I was there. It's an easy check, sounds tend to sound like they are coming from one place when they are really somewhere else. I'm on eibach R2 coilovers with the original upper mounts, using Spohn endlinks with Eibach sway bar. I had a factory end link go bad and it actually didn't make any noise, I noticed it replacing pads.

spadz93 · 09-05-2016, 07:01 PM

Quote:

Originally Posted by 3rdgen3

If youre hearing thuds over bumps in the front id bet the stock upper strut mounts have seen better days. Being a 2010 did you reuse the stock strut mounts when you replaced the struts or did you upgrade to some FE4 strut mounts?

Over time the strut mounts can develop some play and i know the early FE3 cars TONS of people complained about thuds over bumps and that was the case!

Reused stock ones. Are these easy to replace?

Also, no thudding when shifting 1st or reverse or back and forth, that's a plus

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spadz93 · 09-13-2016, 01:18 PM

Anything?

Jrichards73 · 09-13-2016, 10:25 PM

I have had the suspension out a million times trying different spring lengths and rates, so if you have compressors I'm going to say taking the front apart and replacing the mounts is easy. Having coilovers does make it easier though as you can release all the tension without the compressors. Still a easy shade tree job either way.

spadz93 · 09-14-2016, 06:59 AM

Quote:

Originally Posted by Jrichards73

I have had the suspension out a million times trying different spring lengths and rates, so if you have compressors I'm going to say taking the front apart and replacing the mounts is easy. Having coilovers does make it easier though as you can release all the tension without the compressors. Still a easy shade tree job either way.

So a spring compressor and then happy days? Pretty sure advance auto rents one out, I'll check. Any how-to or other advice?

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spadz93 · 10-05-2016, 07:14 AM

updated link in OP

frankwjr · 10-05-2016, 07:30 AM

Question, has the car ever been aligned? I suggest finding a shop that will work with you...have them diag what needs replacing...then do the work yourself(if you wrench) and take it back after to be aligned....chances are ANYTHING we do on the suspension will possibly require an alignment....and since tires ain't cheap! Plus the alignment made a nice improvement in handling...

spadz93 · 10-05-2016, 02:59 PM

Quote:

Originally Posted by frankwjr

Question, has the car ever been aligned? I suggest finding a shop that will work with you...have them diag what needs replacing...then do the work yourself(if you wrench) and take it back after to be aligned....chances are ANYTHING we do on the suspension will possibly require an alignment....and since tires ain't cheap! Plus the alignment made a nice improvement in handling...

I updated the op in my other thread, its my motor mounts

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08-31-2016, 11:19 AM	#1
spadz93 BUMBL Z Drives: 2015 ZL1 Join Date: Nov 2013 Location: Northern NJ Posts: 2,573 View My Garage	Thudding on acceleration/bumps Putting my thread over here in hopes I get a little more input. Replaced trans and motor mounts and still no dice. Edit: new update http://www.camaro5.com/forums/showthread.php?t=462117 __________________ Current: 2015 ZL1 M6, Rotofab Intake, LS3 throttle body, 2.55 Upper/9.17 Lower w/ Idler Relocation, DMS Reinforced Brick, ID1050X, 1 7/8" Headers, ProSpeed HX/Reservoir, DSX Aux Pump/Flex Fuel Sensor, E85, McLeod RXT, BMR 1" Drop, Tuned by Pat G Past: 2010 2SS, some bolt ons, 415rwhp/400rwtq Last edited by spadz93; 10-05-2016 at 07:14 AM.

08-31-2016, 11:30 AM	#3
spadz93 BUMBL Z Drives: 2015 ZL1 Join Date: Nov 2013 Location: Northern NJ Posts: 2,573 View My Garage	Welcoming that idea. Any good way to test aside from tearing it apart? __________________ Current: 2015 ZL1 M6, Rotofab Intake, LS3 throttle body, 2.55 Upper/9.17 Lower w/ Idler Relocation, DMS Reinforced Brick, ID1050X, 1 7/8" Headers, ProSpeed HX/Reservoir, DSX Aux Pump/Flex Fuel Sensor, E85, McLeod RXT, BMR 1" Drop, Tuned by Pat G Past: 2010 2SS, some bolt ons, 415rwhp/400rwtq

09-04-2016, 06:29 PM	#4
Jrichards73 Drives: 2011 2SS/RS Victory Red Join Date: Aug 2011 Location: Virginia Posts: 921	Shift into first then into reverse, if you hear a thud each way the differential bolts are loose. Specifically on the passenger side as the oval bolt hole in the subframe is vertical on that side. You will also be able to see the right axle jump up or down from underneath it. As you lock down parts of the drivetrain you will start finding things loose, where the factory bushes were absorbing it, now that it is polly, solid, or whatever, it is transfering that torsion somewhere else. __________________ Updates: BTR Stage 2 VVT Cam Kit w/Smith Brothers Trunnions, Fluidampr, RX catch can, B&M Trans pan mod, Kooks Black Headers, Borla S-tunes, Eibach Multi-Pro-R2 coilovers and Swaybars, BMR Full Bushing kit with Toe and Trailing arms, RB Rotors w/EBC Pads, GForce 1400 Axles (now on order). AVH-X5800BHS in Scosche GM5201AB.

09-05-2016, 04:22 PM	#6
3rdgen3 10-bolt Destroyer Drives: 2012 Camaro 2SS/RS - AGM, LS3/6M Join Date: Jun 2012 Location: Canukistan Posts: 860	If youre hearing thuds over bumps in the front id bet the stock upper strut mounts have seen better days. Being a 2010 did you reuse the stock strut mounts when you replaced the struts or did you upgrade to some FE4 strut mounts? Over time the strut mounts can develop some play and i know the early FE3 cars TONS of people complained about thuds over bumps and that was the case! __________________ 2012 Camaro 2SS/RS - LS3/TR6060: Cam, Headers, Exhaust, Intake, Gears, Twin Disk, Suspension, Tuned - 475rwhp, 443rwtq

09-05-2016, 04:31 PM	#7
Jrichards73 Drives: 2011 2SS/RS Victory Red Join Date: Aug 2011 Location: Virginia Posts: 921	It is a retorque, but I added Delrin bushings while I was there. It's an easy check, sounds tend to sound like they are coming from one place when they are really somewhere else. I'm on eibach R2 coilovers with the original upper mounts, using Spohn endlinks with Eibach sway bar. I had a factory end link go bad and it actually didn't make any noise, I noticed it replacing pads. __________________ Updates: BTR Stage 2 VVT Cam Kit w/Smith Brothers Trunnions, Fluidampr, RX catch can, B&M Trans pan mod, Kooks Black Headers, Borla S-tunes, Eibach Multi-Pro-R2 coilovers and Swaybars, BMR Full Bushing kit with Toe and Trailing arms, RB Rotors w/EBC Pads, GForce 1400 Axles (now on order). AVH-X5800BHS in Scosche GM5201AB.

08-31-2016, 11:21 AM	#2
BandRcAMARO Drives: 2010 Camaro 2SS/RS Join Date: Apr 2016 Location: Michigan Posts: 229 View My Garage	could be sway bar links going bad or the bushings?

09-13-2016, 01:18 PM	#9
spadz93 BUMBL Z Drives: 2015 ZL1 Join Date: Nov 2013 Location: Northern NJ Posts: 2,573 View My Garage	Anything? __________________ Current: 2015 ZL1 M6, Rotofab Intake, LS3 throttle body, 2.55 Upper/9.17 Lower w/ Idler Relocation, DMS Reinforced Brick, ID1050X, 1 7/8" Headers, ProSpeed HX/Reservoir, DSX Aux Pump/Flex Fuel Sensor, E85, McLeod RXT, BMR 1" Drop, Tuned by Pat G Past: 2010 2SS, some bolt ons, 415rwhp/400rwtq

09-13-2016, 10:25 PM	#10
Jrichards73 Drives: 2011 2SS/RS Victory Red Join Date: Aug 2011 Location: Virginia Posts: 921	I have had the suspension out a million times trying different spring lengths and rates, so if you have compressors I'm going to say taking the front apart and replacing the mounts is easy. Having coilovers does make it easier though as you can release all the tension without the compressors. Still a easy shade tree job either way. __________________ Updates: BTR Stage 2 VVT Cam Kit w/Smith Brothers Trunnions, Fluidampr, RX catch can, B&M Trans pan mod, Kooks Black Headers, Borla S-tunes, Eibach Multi-Pro-R2 coilovers and Swaybars, BMR Full Bushing kit with Toe and Trailing arms, RB Rotors w/EBC Pads, GForce 1400 Axles (now on order). AVH-X5800BHS in Scosche GM5201AB.

10-05-2016, 07:14 AM	#12
spadz93 BUMBL Z Drives: 2015 ZL1 Join Date: Nov 2013 Location: Northern NJ Posts: 2,573 View My Garage	updated link in OP __________________ Current: 2015 ZL1 M6, Rotofab Intake, LS3 throttle body, 2.55 Upper/9.17 Lower w/ Idler Relocation, DMS Reinforced Brick, ID1050X, 1 7/8" Headers, ProSpeed HX/Reservoir, DSX Aux Pump/Flex Fuel Sensor, E85, McLeod RXT, BMR 1" Drop, Tuned by Pat G Past: 2010 2SS, some bolt ons, 415rwhp/400rwtq

10-05-2016, 07:30 AM	#13
frankwjr Drives: 2010 SS 2SS M6 Join Date: Aug 2016 Location: Smithsburg, Md. Posts: 2,445	Question, has the car ever been aligned? I suggest finding a shop that will work with you...have them diag what needs replacing...then do the work yourself(if you wrench) and take it back after to be aligned....chances are ANYTHING we do on the suspension will possibly require an alignment....and since tires ain't cheap! Plus the alignment made a nice improvement in handling... __________________ 2010 SS 2SS M6 - Tune by RDP dynoSteve!(Woot) - Daily Driver - *150K!* - All work by me...