Vibration under heavy load...lets brainstorm! - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

TRC-SS · 05-01-2018, 02:53 PM

2011 Camaro SS with 700ish rwhp.

Last july replaced my axels to DSS 1000hp axels as a precaustion. No vibrations. I then added MT ET streets for rear tires. no vibrations.

fast track to september. After driving all summer with my ET streets the car developed a vibration in the rear under load only. I could be going 80mph coasting with no issues. I only get a vibration when the pedal is to the floor and the car is torquing.

Stock transmission other than clutch. Stock rear end and stock drive shalf.

Drive shalf bolts are all in place and tight. axels are tight, all bolts on wheels are tight.

New rims and tires, mounted and balanaced, vibration still present under heavy load only.

So when i have the pedal planted mainly in 3rd gear and up the vibration is very noticable in my seat to the rear. The second i let off, it goes away.

Thoughts?

xc_SS/RS · 05-02-2018, 08:28 AM

did you happen to check any of the rear bushings?

TRC-SS · 05-04-2018, 08:39 AM

no haven't checked those.

Im scared its the actual axles themselves....

Rock-It Man · 05-04-2018, 02:00 PM

There's another thread about a similar sounding problem.https://www.camaro5.com/forums/showthread.php?t=525284

If you're sure about the drive shaft couplings and bolts, and the vibration is under heavy load only, look at the engine mounts, transmission mounts, and rear axel mounts.

TRC-SS · 05-04-2018, 04:10 PM

Quote:

Originally Posted by Rock-It Man

There's another thread about a similar sounding problem.https://www.camaro5.com/forums/showthread.php?t=525284

If you're sure about the drive shaft couplings and bolts, and the vibration is under heavy load only, look at the engine mounts, transmission mounts, and rear axel mounts.

Thanks!

I think the shop figured it out...ill know more tomorrow

TRC-SS · 05-06-2018, 05:34 PM

Everything was checked underneath by a local speed shop. Everything was tight and in working order. so I'm only assuming its got to be the axles. They are the worst at 2-3k rpms when punching the throttle. At higher rpms its not really noticeable.

I guess ill just send it and hope for the best!

LHRxDeadx · 06-05-2018, 03:01 PM

did you figure it out?

farm rat · 06-05-2018, 03:30 PM

Throw out bearing?

LHRxDeadx · 06-06-2018, 01:02 AM

Quote:

Originally Posted by farm rat

Throw out bearing?

i replaced mine that wasnt it

redcoats1976 · 06-07-2018, 04:02 PM

could there be enough slop in the engine/trans/rearend mounts to cause the pinion angle to change when the gas is applied heavily?

TRC-SS · 07-30-2018, 01:25 PM

No still haven’t figured it out

LHRxDeadx · 08-03-2018, 02:24 AM

Quote:

Originally Posted by TRC-SS

No still haven’t figured it out

i havent either. ive got 4 drag days on it and a handfull of track days. whish something would just brake!

question do you have upgraded axels

Nb1081 · 08-03-2018, 07:33 AM

Sounds like a u joint in drive shaft but i just got one of these cars a week ago but ive had bad u joints that had no slop till u took it apart and the dry rusty needle bearings go flying out hell you coulda chucked a weight off the driveshaft and thats a lil out of balance now

TRC-SS · 08-04-2018, 05:26 PM

Ive checked everything....but yesterday i brought my Mickey Thompson Drag radials into the shop and had them road forced balanced. They were way off after only 400 miles.

I took it out for a rip, and there is barely any vibration anymore.

Im wondering if its been the damn tires the whole time.

05-01-2018, 02:53 PM	#1
TRC-SS 700RWHP-650TQ Drives: 2011 Forged LS3 Supercharged/Cammed Join Date: Aug 2010 Location: Shrewsbury Massachusetts Posts: 5,269 View My Garage	Vibration under heavy load...lets brainstorm! 2011 Camaro SS with 700ish rwhp. Last july replaced my axels to DSS 1000hp axels as a precaustion. No vibrations. I then added MT ET streets for rear tires. no vibrations. fast track to september. After driving all summer with my ET streets the car developed a vibration in the rear under load only. I could be going 80mph coasting with no issues. I only get a vibration when the pedal is to the floor and the car is torquing. Stock transmission other than clutch. Stock rear end and stock drive shalf. Drive shalf bolts are all in place and tight. axels are tight, all bolts on wheels are tight. New rims and tires, mounted and balanaced, vibration still present under heavy load only. So when i have the pedal planted mainly in 3rd gear and up the vibration is very noticable in my seat to the rear. The second i let off, it goes away. Thoughts? __________________ View Build HERE>>>>>MY 2011 2SS/RS JOURNAL

05-02-2018, 08:28 AM	#2
xc_SS/RS Drives: 2010 Camaro SS/RS Join Date: Mar 2014 Location: somewhere in MD Posts: 4,883	did you happen to check any of the rear bushings? __________________ 2010 2SS/RS Z/28 intake, NW, FAST 102, speed engineering LT's, some exhaust, ATI -10% pulley, GM flex fuel injectors, DSX flex fuel sensor, MGW shifter, HP Tuners, some suspension work, stickers and a little weight loss. 12.63 @113.53

05-04-2018, 08:39 AM	#3
TRC-SS 700RWHP-650TQ Drives: 2011 Forged LS3 Supercharged/Cammed Join Date: Aug 2010 Location: Shrewsbury Massachusetts Posts: 5,269 View My Garage	no haven't checked those. Im scared its the actual axles themselves.... __________________ View Build HERE>>>>>MY 2011 2SS/RS JOURNAL

05-06-2018, 05:34 PM	#6
TRC-SS 700RWHP-650TQ Drives: 2011 Forged LS3 Supercharged/Cammed Join Date: Aug 2010 Location: Shrewsbury Massachusetts Posts: 5,269 View My Garage	Everything was checked underneath by a local speed shop. Everything was tight and in working order. so I'm only assuming its got to be the axles. They are the worst at 2-3k rpms when punching the throttle. At higher rpms its not really noticeable. I guess ill just send it and hope for the best! __________________ View Build HERE>>>>>MY 2011 2SS/RS JOURNAL

06-05-2018, 03:30 PM	#8
farm rat Drives: 2011 Vistory Red 1LS Join Date: May 2018 Location: Missouri Posts: 487	Throw out bearing? __________________ The Original Farm Rat 2011 1LS M6 Victory Red Sold 1967 Coupe Green and White 1969 SS 396 Hugger Orange 1969 Z/28 All original White with deluxe interior 1970 RS Blue 1978 Coupe Fugly Green 1978 WS-6 Trans-Am Factory 4 speed 1985 IROC-Z Red

05-04-2018, 02:00 PM	#4
Rock-It Man 376 cubic inches of fun Drives: 2023 Camaro ZL1 A10 Join Date: Jul 2010 Location: MA Posts: 4,030 View My Garage	There's another thread about a similar sounding problem.https://www.camaro5.com/forums/showthread.php?t=525284 If you're sure about the drive shaft couplings and bolts, and the vibration is under heavy load only, look at the engine mounts, transmission mounts, and rear axel mounts.

06-05-2018, 03:01 PM	#7
LHRxDeadx Drives: 2013 Camaro 2SS Inferno Orange Join Date: Apr 2015 Location: Utah Posts: 174	did you figure it out?

06-07-2018, 04:02 PM	#10
redcoats1976 Drives: LT W/2LT,blue metallic Join Date: Jul 2016 Location: central florida Posts: 4,915	could there be enough slop in the engine/trans/rearend mounts to cause the pinion angle to change when the gas is applied heavily?

07-30-2018, 01:25 PM	#11
TRC-SS 700RWHP-650TQ Drives: 2011 Forged LS3 Supercharged/Cammed Join Date: Aug 2010 Location: Shrewsbury Massachusetts Posts: 5,269 View My Garage	No still haven’t figured it out __________________ View Build HERE>>>>>MY 2011 2SS/RS JOURNAL

08-03-2018, 07:33 AM	#13
Nb1081 Drives: 10 2ss/rs Join Date: Jul 2018 Location: Shelby ny Posts: 436	Sounds like a u joint in drive shaft but i just got one of these cars a week ago but ive had bad u joints that had no slop till u took it apart and the dry rusty needle bearings go flying out hell you coulda chucked a weight off the driveshaft and thats a lil out of balance now __________________ [/SIGPIC]10 2ss ls3 sw long tubes,cai intake,phastek scoop,se3" exhaust,elite e2, bw stg2tb, tsp f35, motive 4.10 lpw cover, 15" conversion, 510whp tuned by john donovan

08-04-2018, 05:26 PM	#14
TRC-SS 700RWHP-650TQ Drives: 2011 Forged LS3 Supercharged/Cammed Join Date: Aug 2010 Location: Shrewsbury Massachusetts Posts: 5,269 View My Garage	Ive checked everything....but yesterday i brought my Mickey Thompson Drag radials into the shop and had them road forced balanced. They were way off after only 400 miles. I took it out for a rip, and there is barely any vibration anymore. Im wondering if its been the damn tires the whole time. __________________ View Build HERE>>>>>MY 2011 2SS/RS JOURNAL