One problem related to automatic transmission torque converter has been reported for the 2009 Toyota Corolla. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Toyota Corolla based on all problems reported for the 2009 Corolla.
While driving to get onto the expressway, the car downshifted. When I got up to speed, it downshifted with a heavy jolt and a bang, the dealer told me the problem happened because of the small motor trying to catch up to the torque converter. This happens regularly. On a trip to the bonneville salt flats, I couldn't see how fast the car would go. At 95 mph the transmission slammed back and fourth in and out of gear. The car dealer checked my car and one of theirs. They both did exactly what I said. They said they suspected a design flaw, but the car wasn't dangerous. Updated 02/14/11.