I was just driving on the highway at 70 mph when my vehicle would out of no where shift to second gear, and would refuse to shift into another no matter what speed i was at, so the fastest speed I could reach was 50mph with the rpm's reaching 4 thousand. This repair wasn't that expensive($115) or difficult to do yourself, the hardest part was getting to the part that needed replacing. If you were to have a mechanic do this it would cost you around $500.