Gearbox assemblies, commonly referred to as transmissions, transfer engine torque to the wheels while providing speed and torque conversion. These units are positioned within the vehicle’s drivetrain, typically between the engine and drive axles. Key components include input/output shafts, gear sets, synchronizers, and housing. Internal gear ratios enable varied output speeds for optimal engine efficiency and vehicle performance. Modern assemblies increasingly utilize electronically controlled actuators for automated shifting and adaptive learning. Robust housings and lubrication systems are critical for managing high mechanical loads and heat generation.