general problems of the 1999 Hyundai Tiburon

While driving at various speeds the transmission would down shift from high gear to lower gear and then lock up. The vehicle would jerk forward and remain in the lowest gear when this happened. The wheel would lock up just prior to being release. The vehicle has been to the dealer who changed the speed sensors 3 months before the transmission was replaced. The speed sensor was replaced 2 times. The pulse generator was replaced a total of 4 times. The thermostat has also been replaced. Also there was a tire label replacement. Stopper and elr seat belt was installed. Blade fuse and wire repairs. Hood latch cleaned. Dealership most recently found the transmission had internal problems and replaced the transmission and flushed the cooler lines.