Strange Noise - GMC Terrain Forum
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post #1 of 6 (permalink) Old 06-02-2019, 08:06 PM Thread Starter
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Strange Noise

My 2019 Equinox Premier began making a noise at low speed, 20-25 mph that sounds like a “wah wah wah noise. This was about 3k miles. Sounds like it is coming from driver side rear wheel. Dealer service manager kept for 3 days but didn’t hear anything. He says it is road noise. Equinox does have road noise but this over and above the road noise. Checked brakes and rotated rear tire to front. Sometimes it sounds like the noise moved to the front and other times it is hard to tell where it comes from.
Anyone have any suggestions or similar issues?
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post #2 of 6 (permalink) Old 06-03-2019, 08:49 AM
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If it moved with the tire ...then could be a flaw in tire. I have had this in tire when one of the internal plies become unglued. If it is that ...get it replaced as it can be dangerous at high speed.

2018 equinox 1.6l Diesel LT, Hecho en Mexico, julio 2017
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post #3 of 6 (permalink) Old 06-24-2019, 08:33 PM
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I'm curious, Do you have the 2.0 with the 9 speed? Is the noise wheel or axel speed? Do you only hear it while accelerating or while under load?
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post #4 of 6 (permalink) Old 06-25-2019, 12:52 AM
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Originally Posted by 2018Nox View Post
I'm curious, Do you have the 2.0 with the 9 speed? Is the noise wheel or axel speed? Do you only hear it while accelerating or while under load?

My 2019 FWD 9 speed 2.0 also seems to be slow to engage drive when shifting from park or neutral, whether hot or cold; as if the fluid level were low, or flow restricted.

What is more concerning is that when accelerating with moderate throttle application; there is what I would describe as gear or bearing noise while applying moderate throttle application. The concern isn't necessarily hearing gear noise; its as if the gears don't mesh properly, making a faint but noticeable rur,rur,rur type noise.

Mine has about 5,500 miles on it. I need have my dealer verify that the fluid level is sufficient and that the noise is "normal" or could not duplicate". The usual dealer provided rhetoric.

An update to this noise issue:

Another forum member has had his 2018 FWD 2.0, 9 speed at his dealer for two months trying to resolve this noise issue.

His dealer has replaced the axles, hubs, half shafts, wheels and tires; has had the whole transaxle replaced two times, and the noise is still there.

He has not posted this on the forum, but PM'd me due to his pursuit of legal action to resolve this.

I really don't want my vehicle to have numerous major components replaced, just to find it's to no avail.

I do have an extended warranty that hopefully will assist me if there is a component failure.

Houston; I believe we may have a problem with our 9 speed transmissions!!!


2019 Chevy Equinox; 2.0 - LT - FWD - Silver Ice/Redline - Purchased 10/20/2018; Mills Chevrolet, Davenport IA
2016 Chevy Equinox; 3.6 - LTZ-AWD - Black/Black - Purchased 7/7/2016; Mills Chevrolet, Davenport IA
2017 Chevy Malibu; 1.5 - LT - Pepperdust - Purchased 8/2017; Green Chevrolet, East Moline, IL
2009 Chevy Silverado; 5.3 -LT - 4WD - Ext. Cab - Granite Met. - Purchased 02/2009; Green Chevrolet, East Moline IL
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post #5 of 6 (permalink) Old 06-25-2019, 06:13 AM
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It is alarming I read of so many transmission issues in vehicles for the past few years and in particular since 2016 or so. And it is across most brands of vehicles. Even the 6 speeds have reported issues, but GM has the issues with 8 speeds and 9 speed it seems.
GM even has now taken to trying different fluids in each of it's transmissions. A mystery and question as to why all of a sudden, these transmissions are so touchy with even the type of fluid they can tolerate.
I've tried to keep up a bit with what is going on in these newer transmissions and I think there may be one common denominator with the issues they have besides quirky transmission controllers (TCM).
The common denominator for issues I think may be the new modulated slip torque converters. Unlike the older "lock up" TC, these new assemblies have clutch surfaces that allow limited slip under some operating conditions. Purportedly, this is to "dampen out" engine power pulsations due to use of AFM and also keeping engine RPM down for fuel efficiency. The combination of the engine ECM and TCM trying to optimize efficiency and produce torque at lower engine RPM has reached critical mass I am thinking.
I am not sure about all this, but I have seen pictures of the innards of the new torque converters and how the thin clutch and metal surfaces are worn and even turned blue from heat caused by "normal" slippage. Well, at least, that is one possible issue, but there are others it seems in this balancing act of engine and transmission interplay.
The only thing worse to me is the use of CVT in newer vehicles. So far, they seem to be relegated to use in smaller lighter vehicles, except for some now larger CUVs.
It's frustrating to think that newer vehicles are not shaping up to be as durable or as reliable when we see these type of issues arise. I question whether we can rely on keeping a vehicle even 5 or 6 years without constant concern for some type of major repair to power train components. So much going on with electronic control systems in vehicles today and the mechanical counterparts that they manipulate.

Is the hardware up to par? Is the software they are using "correct" for proper operation? Are the materials and design of the mechanical elements meeting specified parameters for durable and reliable operation?

Well, it's trash day for me today. Got to get the bins out to the curb. Hoping for all it's not our vehicles that have to be carted out there some day. . .

2015 Equinox LTZ 3.6L FWD Champagne Silver Metallic *Build Date 1-08-2015 * *38,865 miles 7-9-2019
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post #6 of 6 (permalink) Old 06-26-2019, 06:45 PM
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...and that's why I took my Terrain on a 3 year lease. I love it, but like my dog off a leash, I don't trust it.
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