Transmission forgets how to shift when driving uphill at around 65 mph and rpms start bouncing between 2000 to 2400 RPM. This will continue for quite some time and typically happens when outdoor ambient temp is above 90F. This problem causes a serious safety issue on the highway as cars are bearing down on you at 70 mph plus and your car refuses to accelerate. This car is a death box and disaster waiting to happen. I guess before anyone will do anything about it people have to die first. This vehicle has been to the dealership more than 4 times for the issue and they always say it can't be replicated and have reprogrammed the computer. The 2010 Chevy Malibu is a lemon! the problem began occurring after 1000 miles and we have given up taking it to the dealer to get fixed. It is obvious they have no clue how to fix it and refuse to acknowledge the problem. We now have 19000 miles on it and the problem never goes away. I wish we could burn this car to the ground. I have documented many other Malibu 2.4L owners with the same issue.

- Waxahachie, TX, USA

In hot weather - over 90 F - on inclines at 40-60 mph the car surges, acceleration repeatedly surges and hesitates and RPM occilates rapidly between 2000-2500 RPM. Problem is intermitant and difficult to reproduce. Refered to by others as RPM bounce. Occured approx 10 times summer 2010 and approx 8 times summer 2011 to date. See public discussion of this issue at Chevy mailibu forum at www.chevymalibuforum.com/forums/showthread.php?T=4843

- Brookeville, MD, USA

2010 Chevrolet Malibu. Consumer writes in regards to vehicle transmission problem the consumer stated while driving 30- 40 mph frequent shifts in the transmission were strong enough to exhibit a slight buck. The dealer was unable to diagnose the problem.

- Dallas, PA, USA

I own a 2010 Chevrolet Malibu while driving 38 mph when I took my foot off the accelerators the car lost power and after I depressed after a few minutes the vehicle speed increased this has happened numerous time my wife is afraid to drive it I took it to the dealer the dealer first said it was the transmission when I took it back to have it repaired General Motors said it was in the computer it did not solve the problem I then was told to use hi test fuelthe current mileage is 1923.

- Franklin Square, NY, USA

2010 Chevy Malibu ltz V6 3.6L has hard gear shift up and down around 15 mph, 35 mph, 50 mph, more noticeably at 15 and 35 mph. This problem, so I assume, also causes the car to accelerate on its own after braking and letting off of the brake to coast around these speeds. When attempting to accelerate the vehicle hesitates and then "lurches" forward into gear. I'm afraid this may cause a rear end collision. Vehicle has been taken to dealership multiple times to investigate/repair problem. Dealership and GM claim this is "normal performance" for this vehicle.

- Mustang, OK, USA

The contact owns a 2010 Chevrolet Malibu. The contact stated while driving 25 mph, the vehicle suddenly stalled and began to accelerate. The vehicle was taken to an authorized dealer where the contact was informed that the transmission needed to be repaired. The dealer reprogrammed the computer and told the contact to only use high grade gasoline. The failure continued. The contact called the manufacturer who was currently exploring other remedies. The failure mileage was approximately 1,900. Updated 01/31/11 updated 02/11/11

- Franklin Square, NY, USA

The contact owns a 2010 Chevrolet Malibu. The contact stated that the transmission would intermittently shift into fourth gear when driving 20 mph and over, causing the transmission to jerk and pull the vehicle with a strong forward force. The vehicle was taken to the dealer several times yet the failure was unable to be duplicated. The manufacturer was contacted but no assistance was offered. The failure mileage was 1,300 and the current mileage was 6,333. Updated 12/15/10. The consumer stated at times, the transmission would miss gears. Updated 12/27/10

- New Hartford, NY, USA

I just took delivery of a 2010 Malibu with 50 miles on the odometer. After leaving the dealership I went to accelerate onto a highway. At this time the car didn't move. The engine didn't rev and the trans felt like it was in neutral. Next the trans slammed into gear and the car accelerated as it should. Not too safe.

- Wanaque, NJ, USA

The contact owns a 2010 Chevrolet Malibu. While driving approximately 30 mph, the vehicle independently shifted into neutral for approximately 10 seconds and would not accelerate. Approximately 10 seconds later, the vehicle began to accelerate as normal. The vehicle was taken to an authorized dealer where the contact was informed that the solenoid was faulty. The authorized dealer was waiting for the manufacturers permission to replace the solenoid. The failure and current mileages were 3,000. Updated 10/13/10 updated 10/19/10

- Whiting, IN, USA

The contact owns a 2010 Chevrolet Malibu. While driving 19 mph there was a noise in the transmission and around the tires. The vehicle was taken to the dealer twice who stated that they were unable to duplicate the failure. A mechanic test drove the vehicle and stated that the noise was coming from the transmission; however, since the mileage was low, they could not repair the failure. The manufacturer was not contacted. The failure and current mileages were 8,000.

- Crownsville, MD, USA

I purchased a 2010 Chevy Malibu on Monday June 28th at finnegan Chevrolet in houston Texas. At the time of purchase it had 14 miles on the odometer. My family and I started to drive back home to Kentucky and at about 300 miles on the unit, the speedometer started to act up with fluctuations and then dropped to 0, upon which we called on-star as an emergency and they checked the vehicle and they said we could continue to drive it and have it checked within 24 hours. We stopped for gas and restarted our travel when at 450 it started becoming worse. We checked again with on-star and they said it had 3 error singles but we should be able to make it back. At 491 miles, the transmission completely failed while driving at 75 miles and hour and almost created an accident but my son was able to bring the car to a stop. We didn't continue but had the car towed to gwatney Chevy in jacksonville, ar. They next day we were told it was a computer malfunction and they road tested the car and it would make it to Kentucky. I took over driving and just 5 miles down the road, lost complete drivetrain/transmission control at 72 miles per hour in a construction zone and almost had an accident again do to the drop in speed. This is two episodes with this vehicle in 24 hours and no assurance from the manufacture it wouldn't happen again. The car is back in gwatney Chevy in jacksonville, ar.

- Union, KY, USA

Chevy Malibu 2010 - brand new with 16mi on odometer.

- Vienna, VA, USA

The contact owns a 2010 Chevrolet Malibu. The contact was driving at an unknown speed proceeding to a complete stop. Suddenly, during acceleration from the full stop within a few seconds the vehicle failed to accelerate. The failures occurred intermittently. The vehicle was taken to an authorized dealer for inspection; however, the technician stated the vehicle was functioning properly. The contact had concerns of the safety risk involved. The failure mileage was 500 and the current mileage was 2,600. Updated 12/30/09 the consumer stated the engine hesitated for nearly a second when the accelerator was applied. Updated 12/30/09

- St. Charles , IL, USA