The TOWLOC is BD’s new programmable transmission and convertor control designed for exhaust brake applications; the most powerful transmission control yet. The TOWLOC monitors the operation of the vehicle speed, engine speed and engine load to compute the optimum transmission control algorithm. This process controls transmission downshifting as well as torque convertor operation for optimum results. You can also customize the unit for the ultimate transmission control for working your truck with an exhaust retarder and a higher performance engine. The TowLoc comes preset with all of the following features but can be modified by a BD accredited Diamond installation facility or by an at home technical buff with a personal computer.The electronics are packaged in weather resistant enclosure for the engine compartment that taps into 10 -12 sources for control and sensing.