Banks Power 55262: Torque Converter Lock Up, Mopar, 47RE, Kit - Banks Power SmartLock electronic braking devices automatically activate when conditions call for braking. SmartLock trans-brakes lock the torque converter and simultaneously raise transmission-line pressure to smoothly reduce vehicle speed. Besides saving wear-and-tear on your service brakes, SmartLock trans-brakes prolong automatic transmission durability by increasing their holding capacity, eliminating excessive clutch slippage, and cooling transmission fluid temperatures.