2017 Limited V6 cabin resonance/drone - JeepForum.com
 
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post #1 of 15 Old 08-23-2017, 09:31 PM Thread Starter
jdacyyz
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Thumbs down 2017 Limited V6 cabin resonance/drone

I have a brand new (1000km / 2 weeks old) GC v6 Limited with 20" wheels. Stock Bridgestone tires and I don't have air suspension. I have an odd low-level hum/resonance that pierces the ears with pressure under following circumstances:
- very low speed over bumps shakes through cabin
- on start and shifting into gear with brake on (slight)
- at highway cruising speed when letting off accelerator and at low rpm, typically in 8th gear

This drone is accompanied with some cabin vibration at highway speeds. Dealer assumed wheel balancing and rotation, but no luck. They told me to drive it for another 1000km to see if any flat spots in tires work themselves out. I thought it might be exhaust vibration, but apparently everything underneath checks out ok. Depending upon headwind, it sometimes feels like I am driving over those speed/rumble strips on the road. Doesn't make sense though because I feel the same thing at such low speeds and then again on the highway. City driving is pretty quiet and smooth.

It's bad enough that my kids don't want to ride in the new car. My daughter says it makes her feel car sick. Not good with a $50k new car.

Any ideas? Is this common for 20" wheels maybe?

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post #2 of 15 Old 08-23-2017, 09:47 PM
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Hm I just picked up my 2017 trailhawk. 18" but is is smooth and quit especially compared to the FJ I had.
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post #3 of 15 Old 08-23-2017, 10:04 PM
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Doesn't sound like tire or wheel to me. Its not a common complaint that comes up here. Vibration at 60-70 mph perhaps, but not drone on a unmodified new Jeep.

So you are saying you hit a bump at very low speed and it will be drone? When does it stop?

Some of those could be caused by transmission clutch chatter.

Some by a marginal wheel bearing.

Some by axle or drive shaft joint.

Some by a loose or defective motor mount.

Its easier to look at the tires, however, and they will do that first. Its common for a dealer to blame the tires regardless.

Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #4 of 15 Old 08-24-2017, 06:51 AM Thread Starter
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Yes, every bump at low speed (less than 20mph) vibrates and drones through the cabin. Highway speeds there is a cabin vibration similar, or same as unbalanced tires (maybe they do have flat spots as well) and when you let off the accelerator with low rpm you get that same drone through the cabin. That's why I thought maybe exhaust.
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post #5 of 15 Old 08-24-2017, 07:19 AM
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I know some people were complaining of a louder than normal or abnormal exhaust noise and it turned out to be the connection between the exhaust manifolds and the exhaust system.

May be worth having them check out.
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post #6 of 15 Old 08-24-2017, 08:39 AM
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Yeah a bump may shake something loose, but there is also a vibration? How long after the bump does the drone continue? Like forever or until you speed up?

Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #7 of 15 Old 08-25-2017, 10:28 PM
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I also am thinking a motor mount issue. My issue was in a front drive Mazda 3 but many of the issues I had are the same as the issues you are having. I was thinking the exhaust was the issue also but once I changed the motor mount it was very quiet.
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post #8 of 15 Old 08-31-2017, 06:59 PM Thread Starter
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Dealer ruled out wheels and tires with a test swap from another unit on the lot. Shop foreman believes he found the issue and has ordered a new rear drive shift. Next week it gets done. We'll see...
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post #9 of 15 Old 09-09-2017, 08:51 AM
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I am having this same problem in my new 17 Altitude 4x4. It sounds like deep Bass in the vehicle at low speeds over the smallest bumps and is perfectly quiet at higher speeds. I took it to the service department at my local dealer and he heard it immediately and wanted the "drivetrain guy" to take a look at it. Unfortunately they wont be able to get me in to see the guy until next week.

OP have you had yours fixed? What was the issue?
I will keep you updated as soon as mine gets looked at.
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post #10 of 15 Old 09-09-2017, 09:00 AM Thread Starter
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Negative. To date dealer (with assistance of Chrysler Canada engineering team) have done the following:
- balanced / rotated tires
- swapped wheels/tires from another vehicle
- replace a rear axle
- replaced rear drive shaft
- replaced front drive shaft

Same result. Vibrating and resonance at low rpm/high speed and also same resonance at low speed (getting louder IMO), while particularly noticeable over small bumps. During city cruising speeds up to 55mph it is fine and pretty smooth and quiet
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post #11 of 15 Old 09-09-2017, 09:13 AM
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Quote:
Originally Posted by jdacyyz View Post
Negative. To date dealer (with assistance of Chrysler Canada engineering team) have done the following:
- balanced / rotated tires
- swapped wheels/tires from another vehicle
- replace a rear axle
- replaced rear drive shaft
- replaced front drive shaft

Same result. Vibrating and resonance at low rpm/high speed and also same resonance at low speed (getting louder IMO), while particularly noticeable over small bumps. During city cruising speeds up to 55mph it is fine and pretty smooth and quiet
Wow thats not good to hear
Listening closely to the sound I feel as if its coming from the rear of the Jeep. I'm thinking of removing the full size spare and see if that cargo area could be vibrating against plastic trim or something...
I'm going to brainstorm on options before leaving my NEW Jeep with less than 600 miles for weeks at the dealer.
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post #12 of 15 Old 09-11-2017, 05:44 AM Thread Starter
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Here we go with Chrysler Canada. "Have customer take back the vehicle and monitor."

No thank you! Confirm it's fixed before I take it back. I don't have the time to play footsie with a brand new car that they cannot fix.

Does anyone from Chrysler read these posts?
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post #13 of 15 Old 09-11-2017, 07:49 AM
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Quote:
Originally Posted by jdacyyz View Post
Here we go with Chrysler Canada. "Have customer take back the vehicle and monitor."

No thank you! Confirm it's fixed before I take it back. I don't have the time to play footsie with a brand new car that they cannot fix.

Does anyone from Chrysler read these posts?
Hey @JeepCares think y'all can look into this?
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post #14 of 15 Old 09-11-2017, 12:40 PM
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Originally Posted by USAFMaverick View Post
Hey @JeepCares think y'all can look into this?
Unfortunately we're limited to assisting customers in the United States. Canadian Customer Care can be reached at (800) 465-2001.

Kori
Jeep Social Care Specialist
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post #15 of 15 Old 09-11-2017, 01:11 PM
ColdCase
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Jeep Canadian used to often participate here, but I haven't heard from them in awhile. They were participating here long before the group based out of the US arrived. FCA may have reorganized their customer support.

Their username is JeepCACares, you could try sending them a PM.

Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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