Two problems related to automatic transmission torque converter have been reported for the 2011 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Chevrolet Impala based on all problems reported for the 2011 Impala.
June 8 2013: when driving, noticed on the freeway, it wasn't smooth at times. The transmission's shifting was pretty rough. No indication of any issues popped up on dashboard. When arriving at freeway ramp, it felt like I was hydroplaning, but on gravel. Then, noticed when pressing the accelerator, was not going anywhere, but felt like I was in neutral. Was able to pull in and take a look. . . Transmission fluid was fine. . . Nothing popped up on the dashboard. Nothing! the indicators for tires, oil, etc were showing info, but nothing to indicate it had died!! dropped it off at the dealership - had just bought it in July 2012. 11 months later, this?!?!? they are saying they have never seen it this bad, even when compared to other ollllllder cars, this was the worst. They have to replace the entire transmission. They called in the gm people to take a look at it. Their auto trans concern: customer states towed in transmission will not move at time of write up reverse and forward working input and reaction carrier excessive clearance metal in torque converter. , valve body, burnt clutches call tac case #71-1194752825 prive comp advised to replace trans due to cost with srta. Ord serial #619asbwjr6j prelacw tih srta flush code 693ffee5 they replaced it under warranty. . . Total cost was $4400 Aug. 29, 2017. The replaced transmission failed. We were on the freeway, just got off, while in motion, there was some really rough vibration. Could not go any faster than 25 mph. No light indications on the dashboard. It tells me if flat tire, blinker is on, the temperature outside, etc etc, but nothing wrong with the transmission. I'm not sure if it's related, but we smelled vinegar every time we started the car for about 4 days straight. We noticed that when accelerating, it's okay, but when letting off the gas on the freeway, it "shudders. ".
Transmission replaced due to torque converter failure. 77000 miles on my 2011 Impala. This vehicle is not driven hard. Driving at about 40 mph- the vehicle slipped out of gear. Very scary for this to happen. Traffic was very light. I was fearful because the street I was on was only one lane in each direction, and not much of a shoulder. I felt very lucky I was not on the freeway. This I believe could have been very dangerous. I was able to drive the car at a very slow speed to a dealership that was less than a mile away. Sad part I was over 300 miles from home. Torque converter failure caused heavy metal debris in the transmission leaving me with a bill totaling $3368. 52. (plus other expenses due to my distance from home. ).