One problem related to automatic transmission torque converter has been reported for the 2008 Chevrolet Impala. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Chevrolet Impala based on all problems reported for the 2008 Impala.
2008 Chevrolet Impala ss with 5. 3l ls4 engine and 4t65e-hd transmission experience torque converter failure at 55k miles requiring full transmission replacement. Replacement transmission beginning to exhibit same torque converter shudder behavior again and warranty will be expiring soon. 4t65e-hd transmission only rated for 280 ft-lbs torque, ls4 v8 produces 323 ft-lbs. This is clearly negligence on the part of general motors and a solution must be reached for owners of these vehicles!.