One problem related to automatic transmission control module has been reported for the 2005 Hyundai Tucson. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Hyundai Tucson based on all problems reported for the 2005 Tucson.
I was driving down the highway at 60mph when the vehicle made a loud sound a roughly jerked forward and continued to do so as the car gradually downshifted. The car was found to have a defected transmission control module and they needed to replace the transmission due to this. This vehicle only had approx 5900 miles on it at this time. Recieved the vehile 9 days later and had the car for 1 day when it continued to have more problems related to the transmission. In addition to this problem, the first few days of owning this vehicle I had to stop the vehicle abruptly and the car accelerated instead. I have read that others have experienced something similiar to this in the Hyundai sante fe.