Vibration in what seems to be the driveline at this point

teddyca · 11-24-2020, 08:34 PM

So I could be naïve but hoping its not the typical A8 shutter. I had it serviced but still here. Had a race shop do an alignment over the weekend and that's spot on but at 50-70ish I get a reoccurring vibration. Wondering if DL is off somehow or I am being ignorant and its trans related. Warranty is gone so I will deal with it unless someone gives me a magic solution.

UPDATE- Got the car back from the dealer today and drove it home about 7 miles. I kept it at a steady speed on the freeway and it is GONE. My buddy that is the service writer there told me the tech did a "triple" flush this time. I asked why this wasn't done the first time and he said the tech had not reached out to GM Engineers the first time??? None the less I am super happy it seems to be fixed and that the tech looked past my mods.

HCI2000SS · 11-24-2020, 09:06 PM

So you've had the latest fluid and flush procedure done?

cdrptrks · 11-24-2020, 11:52 PM

You could check to see if there are any wheel weights missing. Or if you just got new tires recently they might not have balanced them well...I always pay for the RoadForce balance.

wwiiavfan · 11-25-2020, 02:49 AM

If it happens only under very light acceleration or just maintaining speed, it’s the shudder. If it also happens when completely off the gas and coasting, look elsewhere like wheel balance, driveshaft problem, wheel bearings, etc.

CHASLT1 · 11-25-2020, 05:35 AM

My new 2019 C7 made in Feb of 2019 with the so called newest fluid had the shudder at 60mph.

KingLT1 · 11-25-2020, 08:23 AM

Put the car in neutral when driving the speed where you feel the vibration, if it doesn't go away it's likely a tire. If it does go away it's likely converter shudder.

metros11 · 11-25-2020, 02:03 PM

I would be looking at the wheels first. Either balancing is off, or perhaps a bent wheel. Hit any pot holes recently?

Jeb114 · 11-26-2020, 11:05 AM

Check your cross Axel shaft bolts they are notorious for coming loose.

JSH · 11-26-2020, 12:36 PM

Has the driveline ever been out of the car? If yes, what work was done?

teddyca · 12-02-2020, 01:53 PM

Thank you everyone for the feedback. I will let you know what I come up with.

teddyca · 12-02-2020, 04:52 PM

Glad I came across this post today. On my way home I stopped at the dealer and had my buddy look up my car. He said powertrain is covered. I said "Think they'll notice the blower?" He said "lets push it through". LOL Dropping off on Tuesday

arpad_m · 12-02-2020, 05:51 PM

Quote:

Originally Posted by teddyca

Glad I came across this post today. On my way home I stopped at the dealer and had my buddy look up my car. He said powertrain is covered. I said "Think they'll notice the blower?" He said "lets push it through". LOL Dropping off on Tuesday

After all, the 2300 looks almost OEM

teddyca · 12-02-2020, 06:21 PM

LOL That's what I am thinking. The service writer is a buddy so hopefully he hands this off to someone that is "cool". I mean sh!t there are bulletins on this crap and it has already been serviced once 9 months ago. I am at 15K c'mon Chevy

Quote:

Originally Posted by arpad_m

After all, the 2300 looks almost OEM

Hyprblu · 12-03-2020, 02:21 AM

More than likely rear wheel balance issues. My M6 does the same thing 52-65 under acceleration. Admittedly I'm missing a few weights from the rears. Stiff tires and the suspension tight transfers vibration into the body.

11-24-2020, 08:34 PM	#1
teddyca Drives: Blown C7 and 6th gen Join Date: Aug 2012 Location: NorCal Posts: 410	Vibration in what seems to be the driveline at this point So I could be naïve but hoping its not the typical A8 shutter. I had it serviced but still here. Had a race shop do an alignment over the weekend and that's spot on but at 50-70ish I get a reoccurring vibration. Wondering if DL is off somehow or I am being ignorant and its trans related. Warranty is gone so I will deal with it unless someone gives me a magic solution. UPDATE- Got the car back from the dealer today and drove it home about 7 miles. I kept it at a steady speed on the freeway and it is GONE. My buddy that is the service writer there told me the tech did a "triple" flush this time. I asked why this wasn't done the first time and he said the tech had not reached out to GM Engineers the first time??? None the less I am super happy it seems to be fixed and that the tech looked past my mods. __________________ 14 Corvette Z51 Coupe - 655RWHP A&A Ti Blower, Alky Control Meth kit, Kooks LT setup, Corsa Catback, Full APR CF kit, RK Sports CF hood, hell CF everything LOL 17 Camaro 2SS 50th edition. TOTALED 6/2019 K&N Intake, MRBP axleback, Eibach kit, 20" Z28 wheels, smoked lights all the way around, Rockford Fosgate system 17 Camaro 2SS 50th edition. Round 2- 8/2019 550/600 RWHP, Magnuson TVS2300, Rotofab Intake, Corsa Xtreme, Air Lift P3 System, 20" Stance SF-07, smoked lights all the way around, Rockford Fosgate system. Last edited by teddyca; 12-10-2020 at 01:53 PM.

11-25-2020, 08:23 AM	#6
KingLT1 Drives: 2016 1SS NFG A8 Join Date: Aug 2017 Location: 46804 Posts: 6,797	Put the car in neutral when driving the speed where you feel the vibration, if it doesn't go away it's likely a tire. If it does go away it's likely converter shudder. __________________ 2016 NFG 1SS A8 Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA

11-26-2020, 12:36 PM	#9
JSH Drives: '20 ZLE Join Date: Jun 2020 Location: Mile High Posts: 3,559	Has the driveline ever been out of the car? If yes, what work was done? __________________ '20 ZL1 1LE A10, OEM short block, LME heads/valve train, E2650. 100+ octanes, no eth, no meth, no N2O. 2/23 - 1031/1004 wheel. 4/23 - 1.41/9.61/145 at DA 7000 ft. (only made five passes). 2/24 - LME 390, E2650, FBO, 100 oct.; 1116hp/ 1063tq; 109 oct. dyno next.

12-02-2020, 04:52 PM	#11
teddyca Drives: Blown C7 and 6th gen Join Date: Aug 2012 Location: NorCal Posts: 410	Glad I came across this post today. On my way home I stopped at the dealer and had my buddy look up my car. He said powertrain is covered. I said "Think they'll notice the blower?" He said "lets push it through". LOL Dropping off on Tuesday __________________ 14 Corvette Z51 Coupe - 655RWHP A&A Ti Blower, Alky Control Meth kit, Kooks LT setup, Corsa Catback, Full APR CF kit, RK Sports CF hood, hell CF everything LOL 17 Camaro 2SS 50th edition. TOTALED 6/2019 K&N Intake, MRBP axleback, Eibach kit, 20" Z28 wheels, smoked lights all the way around, Rockford Fosgate system 17 Camaro 2SS 50th edition. Round 2- 8/2019 550/600 RWHP, Magnuson TVS2300, Rotofab Intake, Corsa Xtreme, Air Lift P3 System, 20" Stance SF-07, smoked lights all the way around, Rockford Fosgate system.

11-24-2020, 09:06 PM	#2
HCI2000SS Drives: 2018 Camaro V6/RS Join Date: Nov 2018 Location: MI Posts: 1,596	So you've had the latest fluid and flush procedure done?

11-24-2020, 11:52 PM	#3
cdrptrks Drives: 2017 Blue Camaro 1SS 1LE with PDR Join Date: Sep 2018 Location: Houston, TX Posts: 962	You could check to see if there are any wheel weights missing. Or if you just got new tires recently they might not have balanced them well...I always pay for the RoadForce balance.

11-25-2020, 02:49 AM	#4
wwiiavfan Drives: 2017 1SS Hyper Blue Join Date: Apr 2017 Location: Wisconsin Posts: 478	If it happens only under very light acceleration or just maintaining speed, it’s the shudder. If it also happens when completely off the gas and coasting, look elsewhere like wheel balance, driveshaft problem, wheel bearings, etc.

11-25-2020, 05:35 AM	#5
CHASLT1 Drives: 2021 Camaro LT1 Join Date: Sep 2020 Location: Tampa FL area Posts: 795	My new 2019 C7 made in Feb of 2019 with the so called newest fluid had the shudder at 60mph.

11-25-2020, 02:03 PM	#7
metros11 Drives: 2018 SS 1LE Join Date: Apr 2017 Location: North Jersey Posts: 776	I would be looking at the wheels first. Either balancing is off, or perhaps a bent wheel. Hit any pot holes recently?

11-26-2020, 11:05 AM	#8
Jeb114 Drives: 2021 300 Join Date: Jan 2015 Location: New Jersey Posts: 968	Check your cross Axel shaft bolts they are notorious for coming loose.

12-02-2020, 01:53 PM	#10
teddyca Drives: Blown C7 and 6th gen Join Date: Aug 2012 Location: NorCal Posts: 410	Thank you everyone for the feedback. I will let you know what I come up with.

12-03-2020, 02:21 AM	#14
Hyprblu Drives: 2018 2SS 1LE Join Date: May 2020 Location: Kalamazoo Michigan Posts: 21	More than likely rear wheel balance issues. My M6 does the same thing 52-65 under acceleration. Admittedly I'm missing a few weights from the rears. Stiff tires and the suspension tight transfers vibration into the body.

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