SmartLock Trans Brake, electronic transmission brake for use with 1999-03 Ford 7.3L (Vehicles with automatic transmissions) The Banks Power electronic braking device for your 1999-2003 Ford Powerstroke 7.3L automatically activates when conditions call for braking. SmartLock locks the torque converter and simultaneously raises transmission-line pressure, to smoothly reduce vehicle speed. Besides saving wear-and-tear on your service brakes, SmartLock prolongs automatic transmission durability by increasing its holding capacity, eliminating excessive clutch slippage, and cooling transmission-fluid temperatures. For use with Banks Brake. Features Saves wear-and-tear on your service brakes Prolongs automatic transmission durability by increasing its holding capacity Eliminates excessive clutch slippage Cools transmission-fluid temperatures For use with Banks Brake For vehicles with Automatic Transmission Automatically activates when Banks Brake is active Locks the torque converter and simultaneously raises trans-line pressure Includes Integrated electronic SmartLock module Wire loom Mounting hardware (Vehicles with automatic transmissions) The Banks Power electronic braking device for your 1999-2003 Ford Powerstroke 7.3L automatically activates when conditions call for braking. SmartLock locks the torque converter and simultaneously raises transmission-line pressure, to smoothly reduce vehicle speed. Besides saving wear-and-tear on your service brakes, SmartLock prolongs automatic transmission durability by increasing its holding capacity, eliminating excessive clutch slippage, and cooling transmission-fluid temperatures. For use with Banks Brake.