The Allison CD850 Cross Drive: A Game-Changer in Vehicle Propulsion Meet the CD850 Cross Drive, the foundation of all transmissions that followed. This was Allison’s first transmission built specifically for vehicle propulsion—designed for tracked vehicles with a groundbreaking innovation: one engine input powering two outputs for independent control of each track. This revolutionary design allowed for precise steering and braking, changing the game for tracked vehicle mobility. 💡 Curious about