be desirable to have at least two different gear ratios in the drive train between the wheels and the ball screw to provide more control of the torque applied to the wheels during both stopping and starting the transmission can contain clutches and gears required to provide both forward and reverse torque to the wheels for stopping and starting the vehicle the clutches in the transmission can be engaged hydraulically using power supplied by a pump on the vehicle 39 s engine a microprocessor can monitor the position of the plungers and the positions of the brake and accelerator pedals to control the operation of the system without the driver needing to operate the vehicle any differently than normal in a typical arrangement as shown in fig1 the transmission 105 and differential 103 can be fixed to the vehicle chassis and torque would be transmitted to and from the rear wheels 100 through constant velocity joints 102 and drive shafts a pinion gear 104 of the differential 103 can transmit torque to and from the transmission 105 the transmission 105 can contain both forward and reverse gearing to control the direction of torque either opposing the direction the vehicle is moving braking or assisting accelerating the vehicle in the direction it is moving the transmission 105 can also contain gear trains of different ratios to control the amount of torque transmitted to the wheels torque from the transmission 105 can be transmitted to and from the ball screw assembly through a one way clutch 106 the ball screw assembly can be connected to the transmission at the end opposite to the differential the ball screw assembly would consist of the ball screw 109 a.