Banks Power 99-03 Ford 7.3L Smartlock Trans BrakeFor 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 and necessary hardware. Banks electronic braking device automatically activates when conditions call for braking. SmartLock locks the torque converter and simultaneously raises transmission line pressure, to smoothly reduce vehicle speed.