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Old 02-28-2020, 09:04 AM   #1
aj0294
 
Drives: 2010 Camaro 2SS/RS
Join Date: Nov 2013
Location: Tuscaloosa, AL
Posts: 8
Sport and Track Mode Vibrations

Please help, I recently took my 2018 2SS (manual) on a drive and noticed a slight vibration upon entering sport mode. After noticing the vibration, I felt the same issue in track mode, just a little more aggressive. The vibration is intermittent but is mostly felt when initially entering Sport and Track mode. I took the car to a dealer for diagnostic but they couldn't find anything.

Some more details on the issue: only felt at speeds between 60 - 80 mph (1500 - 2000 rpm), high frequency vibration, low frequency sound, vibration still occurs while car is coasting in neutral (between 60 - 80 mph), and vibration is not evident when vehicle is stationary at same rpm range. The vibration is intermittent (but rare) in touring mode and is non existent in snow/ice mode.

If you have any ideas, please shoot them my way. I've been trying to figure this out for the past couple days now.
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Old 02-28-2020, 07:57 PM   #2
arpad_m


 
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If it's most audible when entering sport or track mode and comes on intermittently, I bet it's the one or both NPP valves squeaking or vibrating inside the outer exhaust pipes when being opening or closed. They're opened even in tour mode, but only under high load, and remain closed in snow/ice mode.

There is a TSB out for a potentially related exhaust rattle concern (number 18-NA-172), but it's hard to tell if you have this or something else, it would help if you could record it and upload a clip somewhere.
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Old 03-14-2020, 06:38 AM   #3
Just.an.ss
 
Drives: 2018 Camaro 1SS
Join Date: Mar 2020
Location: California
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https://youtu.be/J2AvrPv_pNc
I have a slight problem with mine as well. No vibrations but a buzzing winding noise when accelerating I’m not sure what it is
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Old 03-14-2020, 08:07 AM   #4
arpad_m


 
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Quote:
Originally Posted by Just.an.ss View Post
https://youtu.be/J2AvrPv_pNc
I have a slight problem with mine as well. No vibrations but a buzzing winding noise when accelerating I’m not sure what it is
This is different from OP's problem. Mine has been making the same noise to be honest, from day 1, a not too loud, but definitely present winding down sound. Adding a supercharger doesn't fix it, that I can tell. Will let you know if I figure it out, I hardly notice it anymore.
__________________
2018 Camaro 2SS
G7E A8 NPP MRC NAV
Magnuson Heartbeat TVS2300 | Roto-Fab CAI | JMS PowerMAX voltage booster
Soler LT5 95mm TB | 1LE replica wheels | BMR rear cradle lockout | Jannetty Racing custom tune
1100 - 1/30/18 | 2000 - 1/31/18
3000 - 2/06/18 TPW 2/26/18
3400 - 2/19/18 | 3800 - 2/26/18
4300 - 2/27/18 | 4B00 - 3/01/18
4200 - 3/05/18 | 4800 - 3/14/18
5000 - 3/16/18 | 6000 - 3/19/18
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