tsb is technical service bulletin basically ford saying we know there is a problem with the car but we r not goin to fix it unless ur in the 3 year 36000 mile warranty which i think al of our cars are out of lol. well ford designed the clutch wrong with i think a bad pressure plate dont quote me and it caused premature wear on the clutch causing them to go out sooner than expected. mine went out in 30.000 miles then ford rebuilt it idk y they did and 20,000 miles later went out again so know i on a cm stage 3 and loving it.