UARA.303 is a 4x4 Transfer Case which is designed with differential lock. When the differential lock is activated, front and rear differential are getting equal torque. In case of the differential lock is deactivated; torque is transmitted to the differentials as needed.It can provide 100% of input speed during 4x2 drive. This Transfer Case makes the truck double speed as high gear and low gear. UARA.303 has designed for shunting locomotive, rail line maintenance vehicle and any application which needs Four-Wheel Drive. The Transfer Case can be built on with lubrication system and preferably can be designe with cooling system. Cooling system can be heat exchanger or cooling fan. Engage/Disengage sensor can be installed on PTO output and main drive.