One problem related to transmission not engage has been reported for the 2010 Hyundai Tucson. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2010 Hyundai Tucson based on all problems reported for the 2010 Tucson.
When traveling at about 35-40 mph, the vehicle sometimes does not engage when trying to automatically shift to the next gear. This causes the driver to lose all acceleration and essentially puts the vehicle into a coast. Tapping on the accelerator does nothing to engage the transmission again. However, after a few seconds or more, the transmission will finally engage. If you happen to have the accelerator pressed this will lurch the vehicle forward. If you happen to be behind another vehicle this could potential cause an accident by ramming the vehicle in front of you. There have been a couple of ¿close calls¿. I have videos of the engine revving that I can supply, but the file sizes are too large to upload. This has been occurring since I purchased the vehicle new. They replaced the transmission at 5000 miles for a similar situation. The problem occurrence diminished, but over the years the problem has been happening more frequently. I have always reported this to the dealer when taking it in for service. The dealer has been unable to replicate the situation or offer any solution. They have been supplied with the videos. The exact cause of this is currently unknown.