Three problems related to automatic transmission torque converter have been reported for the 2004 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Chevrolet Impala based on all problems reported for the 2004 Impala.
The car is shifting hard from 1st to 2nd gear and every once in a while when I slow down around a curve and then the car has to shift down and back up right away. This has been getting worse and worse and from what I have been reading, it probably isn't the transmission but with the vacuum modular or torque converter. I also had a 2005 and recently traded it in for a different vehicle, but it had the same thing with shifting hard between 1st and 2nd.
The contact owns a 2004 Chevrolet Impala. While driving approximately 60 mph, the gear shifter failed to shift into all gears. The vehicle was taken to the dealer where it was diagnosed that the torque converter and clutch assembly failed and needed to be replaced. The vehicle was repaired. In addition, while the vehicle was in reverse, there was a delay when shifting into gear. Also, the vehicle would jerk when shifted into drive and the passing gear would get rough going in and out of gear. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failures. The approximate failure mileage was 134,273.
There are 2 people other than myself that have Chevrolet Impalas. One person has a 2005 but the other and myself have the 2004. All three are having the same problem you will be stopped and start the gas pedal and there is a jerk . Feels like some one has hit the back of the car. (transmission or torque converter. ).