Ker-Train Research Inc. (KTR) in collaboration with Southwest Research Institute (SwRI), Control Point Corporation (CPC) and the Tank Automotive Research Development and Engineering Center (TARDEC) Ground Vehicle Power and Mobility (GVPM) has completed the design and fabrication of an efficient Bradley Fighting Vehicle (BFV) power take-off (PTO) fan drive system with electronic controls to demonstrate performance gains in top speed and speed on grade as well as provide fuel savings. This paper provides information on the 8-speed fan drive design, technology, and binary logic architecture. The history of the fan drive development is also discussed.