A flexor connector drive system for mechanical flexors of a modular causeway system includes a linear slide mechanism coupled to a linear drive located within a well on a first section of the causeway system. The linear slide mechanism is adapted to be driven out of the well by the linear drive and couple to a flexor located within a well on a second section of the causeway. Upon reversal of the linear drive, the linear slide mechanism pulls the flexor into the well on the first section, for interconnecting the two sections. The linear drive includes a high helix screw that provides high torque under high speed conditions for quickly moving the heavy flexor between the two sections.