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Old 02-28-2020, 09:04 AM   #1
aj0294
 
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Drives: 2018 Camaro 2SS
Join Date: Nov 2013
Location: Mobile, AL
Posts: 13
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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Drives: 2018 Camaro 2SS A8
Join Date: Jul 2017
Location: East Tennessee
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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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2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq

Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods
JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE 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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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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Drives: 2018 Camaro 2SS A8
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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 MX0 NPP F55 IO6
735 rwhp | 665 rwtq

Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods
JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE 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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