Vibration "rumble" question
Thread Starter
Burning Brakes
Joined: Sep 2012
Posts: 801
Likes: 259
From: Gambrills, Maryland
Vibration "rumble" question
2017 Z06 A8 non-Z07, built 5/17, just purchased.
Have noted an odd vibration that feels almost like running over rumble strips at highway speed. Hate to admit it, but noted this on the drive home when we took delivery a couple of weeks ago but figured the car had been sitting since May and the milage was "7" IIRC so initially figured it was due to being parked so long and being brand new.
I have read all kinds of reports pointing toward transmission, torque converter, eLSD and even wheels but seems like a lot of conflicting info so trying to narrow it down a bit.
The rumble seems rhythmic, present for a little over a second, a pause then back again and is most prevalent at 60MPH or so. Have bumped the transmission into neutral and it seems to persist so thinking that may help to rule out driveline but unsure. Stays in V8 mode and haven't noted any fluctuation in RPMs.
Have had wheel/balance issues on cars in the past but the vibration never seemed to "come and go" but not ruling anything out.
Suggestions for troubleshooting/isolation this?
Appreciate it...
Allen
Have noted an odd vibration that feels almost like running over rumble strips at highway speed. Hate to admit it, but noted this on the drive home when we took delivery a couple of weeks ago but figured the car had been sitting since May and the milage was "7" IIRC so initially figured it was due to being parked so long and being brand new.
I have read all kinds of reports pointing toward transmission, torque converter, eLSD and even wheels but seems like a lot of conflicting info so trying to narrow it down a bit.
The rumble seems rhythmic, present for a little over a second, a pause then back again and is most prevalent at 60MPH or so. Have bumped the transmission into neutral and it seems to persist so thinking that may help to rule out driveline but unsure. Stays in V8 mode and haven't noted any fluctuation in RPMs.
Have had wheel/balance issues on cars in the past but the vibration never seemed to "come and go" but not ruling anything out.
Suggestions for troubleshooting/isolation this?
Appreciate it...
Allen
Last edited by Allen_B; Dec 7, 2017 at 09:06 PM.
Melting Slicks
Joined: May 2004
Posts: 2,426
Likes: 285
From: West Barnstable MA
2017 Z06 A8 non-Z07, built 5/17, just purchased.
Have noted an odd vibration that feels almost like running over rumble strips at highway speed. Hate to admit it, but noted this on the drive home when we took delivery a couple of weeks ago but figured the car had been sitting since May and the milage was "7" IIRC so initially figured it was due to being parked so long and being brand new.
I have read all kinds of reports pointing toward transmission, torque converter, eLSD and even wheels but seems like a lot of conflicting info so trying to narrow it down a bit.
The rumble seems rhythmic, present for a little over a second, a pause then back again and is most prevalent at 60MPH or so. Have bumped the transmission into neutral and it seems to persist so thinking that may help to rule out driveline but unsure. Stays in V8 mode and haven't noted any fluctuation in RPMs.
Have had wheel/balance issues on cars in the past but the vibration never seemed to "come and go" but not ruling anything out.
Suggestions for troubleshooting/isolation this?
Appreciate it...
Allen
Have noted an odd vibration that feels almost like running over rumble strips at highway speed. Hate to admit it, but noted this on the drive home when we took delivery a couple of weeks ago but figured the car had been sitting since May and the milage was "7" IIRC so initially figured it was due to being parked so long and being brand new.
I have read all kinds of reports pointing toward transmission, torque converter, eLSD and even wheels but seems like a lot of conflicting info so trying to narrow it down a bit.
The rumble seems rhythmic, present for a little over a second, a pause then back again and is most prevalent at 60MPH or so. Have bumped the transmission into neutral and it seems to persist so thinking that may help to rule out driveline but unsure. Stays in V8 mode and haven't noted any fluctuation in RPMs.
Have had wheel/balance issues on cars in the past but the vibration never seemed to "come and go" but not ruling anything out.
Suggestions for troubleshooting/isolation this?
Appreciate it...
Allen
Le Mans Master
Joined: Sep 2000
Posts: 5,027
Likes: 320
From: N. CA
Thread Starter
Burning Brakes
Joined: Sep 2012
Posts: 801
Likes: 259
From: Gambrills, Maryland
The closest descriptions I've found relate to TC issues, but there is no RPM fluctuations and persists even when bumping the transmission to neutral. For the last part about it persisting in neutral, I actually need to test more on a good, flat road but that's a bit rare near DC!
Allen
Le Mans Master
Joined: Sep 2000
Posts: 5,027
Likes: 320
From: N. CA
2017 Z06 A8 non-Z07, built 5/17, just purchased.
Have noted an odd vibration that feels almost like running over rumble strips at highway speed. Hate to admit it, but noted this on the drive home when we took delivery a couple of weeks ago but figured the car had been sitting since May and the milage was "7" IIRC so initially figured it was due to being parked so long and being brand new.
I have read all kinds of reports pointing toward transmission, torque converter, eLSD and even wheels but seems like a lot of conflicting info so trying to narrow it down a bit.
The rumble seems rhythmic, present for a little over a second, a pause then back again and is most prevalent at 60MPH or so. Have bumped the transmission into neutral and it seems to persist so thinking that may help to rule out driveline but unsure. Stays in V8 mode and haven't noted any fluctuation in RPMs.
Suggestions for troubleshooting/isolation this?
Have had wheel/balance issues on cars in the past but the vibration never seemed to "come and go" but not ruling anything out.
Appreciate it...
Allen
Have noted an odd vibration that feels almost like running over rumble strips at highway speed. Hate to admit it, but noted this on the drive home when we took delivery a couple of weeks ago but figured the car had been sitting since May and the milage was "7" IIRC so initially figured it was due to being parked so long and being brand new.
I have read all kinds of reports pointing toward transmission, torque converter, eLSD and even wheels but seems like a lot of conflicting info so trying to narrow it down a bit.
The rumble seems rhythmic, present for a little over a second, a pause then back again and is most prevalent at 60MPH or so. Have bumped the transmission into neutral and it seems to persist so thinking that may help to rule out driveline but unsure. Stays in V8 mode and haven't noted any fluctuation in RPMs.
Suggestions for troubleshooting/isolation this?
Have had wheel/balance issues on cars in the past but the vibration never seemed to "come and go" but not ruling anything out.
Appreciate it...
Allen
1. Absolutely get all fours balanced and keep the tires inflated properly.
2. You can check if it running in AFM by going to the "INFO" screen and dropping down about three screens to where it shows V8 or V4. If it does it in V8 then not AFM (DOD).
Last edited by BOBSZ06; Dec 9, 2017 at 10:24 AM.
1st Gear
Joined: Dec 2017
Posts: 1
Likes: 0
drivetrain vibration
2017 Z06 A8 non-Z07, built 5/17, just purchased.
Have noted an odd vibration that feels almost like running over rumble strips at highway speed. Hate to admit it, but noted this on the drive home when we took delivery a couple of weeks ago but figured the car had been sitting since May and the milage was "7" IIRC so initially figured it was due to being parked so long and being brand new.
I have read all kinds of reports pointing toward transmission, torque converter, eLSD and even wheels but seems like a lot of conflicting info so trying to narrow it down a bit.
The rumble seems rhythmic, present for a little over a second, a pause then back again and is most prevalent at 60MPH or so. Have bumped the transmission into neutral and it seems to persist so thinking that may help to rule out driveline but unsure. Stays in V8 mode and haven't noted any fluctuation in RPMs.
Have had wheel/balance issues on cars in the past but the vibration never seemed to "come and go" but not ruling anything out.
Suggestions for troubleshooting/isolation this?
Appreciate it...
Allen
Have noted an odd vibration that feels almost like running over rumble strips at highway speed. Hate to admit it, but noted this on the drive home when we took delivery a couple of weeks ago but figured the car had been sitting since May and the milage was "7" IIRC so initially figured it was due to being parked so long and being brand new.
I have read all kinds of reports pointing toward transmission, torque converter, eLSD and even wheels but seems like a lot of conflicting info so trying to narrow it down a bit.
The rumble seems rhythmic, present for a little over a second, a pause then back again and is most prevalent at 60MPH or so. Have bumped the transmission into neutral and it seems to persist so thinking that may help to rule out driveline but unsure. Stays in V8 mode and haven't noted any fluctuation in RPMs.
Have had wheel/balance issues on cars in the past but the vibration never seemed to "come and go" but not ruling anything out.
Suggestions for troubleshooting/isolation this?
Appreciate it...
Allen
Thread Starter
Burning Brakes
Joined: Sep 2012
Posts: 801
Likes: 259
From: Gambrills, Maryland
As for AFM, have specifically monitored it and verified the issue is present in V8 mode...
Allen
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Race Director
Joined: Oct 2008
Posts: 16,671
Likes: 7,738
From: NJ
OP. I have a section of highway near me that I travel to get everywhere. So does everyone else incldikng trucks etc. I notice everyone one of my vehicles act funny on about 10 15 miles of it. But if I take it away or a different high-speed road? Nada.. . Try that first. I mean go for a long long ride. Different Interstate parkway whatever and see what happens. if I stayed around here trying to diag that or a poor tech? Car would have been lemoned lol.
Let us know how it goes.
Let us know how it goes.
Instructor
Joined: Jun 2009
Posts: 246
Likes: 26
From: Statesville NC
Those that the flush fixed, could you feel the vibration in neutral and v8 mode?
With the way it is in a rhythm it seems like a tire issue. If the wheels and fine I won't if it is a issue with the tire itself. There have been a couple discussions in which Michelin tires had issues which resulted in the rhythmic vibration we are feeling.
With the way it is in a rhythm it seems like a tire issue. If the wheels and fine I won't if it is a issue with the tire itself. There have been a couple discussions in which Michelin tires had issues which resulted in the rhythmic vibration we are feeling.
Thread Starter
Burning Brakes
Joined: Sep 2012
Posts: 801
Likes: 259
From: Gambrills, Maryland
I appreciate the input from the folks here. Although my usual routes don't have much opportunity for smooth, constant speeds I can say that further unscientific testing is pointing more toward tires/wheels. Managed to consistently re-create the issue at speeds above 55 or so, smooth roads, confirming in V8 and again, bumping into neutral to help eliminate driveline contributors...
Will report back what if anything is discovered and diagnosed.
Allen
Last edited by Allen_B; Dec 12, 2017 at 08:41 PM.
Melting Slicks
Joined: Apr 2004
Posts: 2,301
Likes: 199
From: Valencia CA
Those that the flush fixed, could you feel the vibration in neutral and v8 mode?
With the way it is in a rhythm it seems like a tire issue. If the wheels and fine I won't if it is a issue with the tire itself. There have been a couple discussions in which Michelin tires had issues which resulted in the rhythmic vibration we are feeling.
With the way it is in a rhythm it seems like a tire issue. If the wheels and fine I won't if it is a issue with the tire itself. There have been a couple discussions in which Michelin tires had issues which resulted in the rhythmic vibration we are feeling.
I have three week old road force balanced pilot super sports and my car just started a weird rythmic vibration at highway speeds.
For example, I can hold it at 75mph and the vibration cycles through about 4 definite and gradually increasing vibrations and then repeats.
Thread Starter
Burning Brakes
Joined: Sep 2012
Posts: 801
Likes: 259
From: Gambrills, Maryland
Dealer took a look today, ordered 3 new tires. They could not get them to balance, even breaking the bead and attempting to reposition the tires on the wheels...
Should have them on Thursday, will report back!
Allen
Should have them on Thursday, will report back!
Allen
Cruising
Joined: Apr 2015
Posts: 10
Likes: 0
Dealer took a look today, ordered 3 new tires. They could not get them to balance, even breaking the bead and attempting to reposition the tires on the wheels...
Should have them on Thursday, will report back!
hope that takes care of your problem ,as I have the same issue good luck and please post on Thursday if you have any news
Allen
Should have them on Thursday, will report back!
hope that takes care of your problem ,as I have the same issue good luck and please post on Thursday if you have any news
Allen
Thread Starter
Burning Brakes
Joined: Sep 2012
Posts: 801
Likes: 259
From: Gambrills, Maryland
Instructor
Joined: Nov 2013
Posts: 225
Likes: 29
From: Corpus Christi TEXAS
I have similar same problem, more shake than vibration but maybe same problem. on my 2016 Z06. Shakes about 45, then starts shaking about 60 and gets worse as I get faster. Discount tire balanced all my ccw wheels, did not fix issue. Then said my front tires were out of round. So they sold me new fronts $500. Did not fix problem. Both discount and a Tire expert said wheels were not bent. So wheel expert 4 way road forced balanced all wheels again, fronts and back. Test drove it, an re-balanced until all was good. So I would say go to a professional tire guy and not discount tire guys or dealership. Someone that will take their time to figure out problem.