The torque converter in your automatic transmission equipped Mustang is basically a fluid operated clutch. It transfers all that engine power to the transmission. Because of all the different applications & operating conditions, no one torque converter can satisfy every Mustang owners needs. With differences in stall speed, size, durability options, & lockup or non-lockup types there is a lot to consider! Don't worry though, we have you covered with many out of the box & custom options for your C4, AOD, AOD-E, 4R70W, & 5R55S.