Car feels like you are driving over rumble strips when the road is clearly smooth. Tried buying new tires and nothing would fix it. Then looked online and found many thousands of people having same issue that has affected all gm 8 speed transmissions for several years. There is a TSB (Technical Service Bulletin) 18-NA-355 on it due to how many people have had this issue. It explains that GM was using fluid that had water issues in it causing all these issues and that the fix is to have it flushed out and replaced with something better. GM was replacing the fluid themselves on unsold vehicles but any that were sold are apparently on their own as they want well over $600 to replace the fluid due to their incompetence. I get that things happen but companies should own up to their mistakes and just fix them. Not asking for anything special just fix your mistake and call it good. Called them and they just want to give a generic response of "you should get that looked at and fixed". Have been a large family of GM only vehicles but we have bought our last one.

- Potterville, MI, USA

I-??ve been experiencing my acceleration and brake pedal engaging without my intervention. While driving, a sudden unintended acceleration will occur followed by the brakes engaging by itself. With the sudden acceleration, fail to accelerate, & delay stopping, all of these factors can cause danger to both the passengers in the car, including myself & others on the road around me which is a very big safety issue. In addition, with the problems i was experiencing & engine light being on my display i took the vehicle to be inspected by Don Mealey Chevrolet in Clermont, Florida 347811 on March 31st 2023. The DTCs Read showed Active, failure code0x00: P0700 Transmission Control System(MIL Request).

- Windermere , FL, USA

Since I-??ve purchased this vehicle I have been having issues with the transmission and engine providing the accurate amount of power as it relates to the acceleration. The persistent issue is the gear shifting lags and rumbles my vehicle each time I accelerate up a hill, accelerating from g20-30mph and it rumbles the gear. I was told the diagnosis was with the spark plugs having an issue on multiple occasions. I-??ve changed the spark plugs several times along with maintaining everything else within the vehicle. This problem still persist. In 2019 my vehicle stopped on the road and the issue pointed to the computer module. I got the module replaced but the problem still persisted. This is unacceptable and there needs to be an investigation done as my car has shut down due to this issue, lost power in mid-traffic and who knows what else issues this is causing. If there is not proper function in this area then it will be detrimental to the safety of the driver. I also have records of my visits at the dealer as I brought this to their attention but was brushed off as it being a spark plug issue.

- Glenwood, IL, USA

Engine began to shudder as if the engine wants to turn off. It can also feel as if there is some issues with the drive axles. It leads to loss of power of the engine. The loss of power goes away upon shutting the engine off and turning it back on however the check engine light remains on and the error code p0420 displays on the reader.

- Carson, CA, USA

The transmission shudder from bad transmission fluid results in major loss of power and makes it unsafe to turn left on green on green..makes me afraid to pull out knowing it might shudder and not get out of the way in time for city traffic...

- Lynchburg, TN, USA

Transmission isn't controlled well. When coming to a complete stop the transmission tends to shift to 1st gear violently which may cause the vehicle to move forward and hit a car in front of you. 2018 Camaro 2.0

- Humble, TX, USA

On or about November 26, 2020, at 1:30 am while driving on I-30 westbound in texarkana, tx traveling at the posted speed of 75 mph in a 2018 Camaro ZL1. The transmission blew out while in cruise control and all systems that transmit power from the engine or propulsion device to the wheels were lost and the vehicle had to coast onto the emergency shoulder until it came to a complete stop away from oncoming traffic. I had contacted Chevy emergency roadside assistance through the vehicles onstar and this service was of no avail. As an alternative I had to utilize triple a in order to have the vehicle towed to orr Chevrolet service department texarkana, tx this vehicle series has the TR6060 transmission is for 6 speed manuals which is manufactured by tremec contains devices and systems that transmit power from the engine or propulsion device to the wheels. Therefore, when shifting between neutral, 1st - 2nd gear and back to neutral encountered numerous events wherein the shifting mechanism grinds and/or drops back into neutral while the vehicle is in motion, with notable fluttering of the shifter and rubbing or friction noise this is associated with the synchronizers. The this is extremely dangerous when pulling in traffic and operating a vehicle in this manner is only a matter of time before a major accident ensues. Consumers similarly complained about the defect on various online forums, https://www.camaro5.com/forums/showthread.php"T=199040 https://www.camaro5.com/forums/showthread.php?T=261882&page=2 https://www.camaro5.com/forums/showthread.php?P=4415830&posted=1#post4415830 https://www.camaro5.com/forums/showthread.php"T=199533

- Katy, TX, USA

Engine cuts out when starting out in 1st gear. Manual transmission. Engine stalled easily. Was rear ended because engine cut out when starting from light and truck behind me drove into me.

- Albany, OR, USA

Grinding sound coming from the rear end, it does it while turning when the car is cold or sat for a few hours, I'm worried that it's going to lock up some day while traveling. I bought it new and the noise started at about 4000 miles, they changed the fluid and the noise never went away, I try to explain it when I take it in, but they're driving it after it's warmed up, so no noises every time, thanks, and I hear about this from other owners.

- Port Charlotte, FL, USA

Upon downshifting to 2nd gear from 3rd gear is very hard, grinds and pops back in neutral, and fluttering noticed on the shifter with rubbing or friction noise.

- Tamarac, FL, USA

The car has a defective transmission housing and the car is hard to downshift or upshift into 2nd gear. The dealers are calling it normal. I have manual 6speed transmission. When I downshift, the shifting liver will either pop right back up into nuteral or grinds.

- Tamarac, FL, USA

2018 2.0liter turbo has shifting issues I believe. It is very violent shifting through gears when first start driving and slowing vehicle down, and seems to cause lag when accelerating in everyday driving.

- Wyandotte, MI, USA

My vehicle has been at kuni Chevrolet in sacramento, ca since 2/1/19 and they have been unable to fix the problem, stability control light on, when I drive over a bump at highway speeds it caused me to veer across 2 lanes. Thankfully I did not hit another car.

- Sacramento, CA, USA

2018 Chevy Camaro. Consumer writes in regards to defective RPM meter.

- Fox Lake, IL, USA