What is a transfer case and 'U' joints?

A transfer case is a component in four-wheel-drive and all-wheel-drive vehicles that distributes power from the transmission to both the front and rear axles, allowing for enhanced traction and stability on various terrains. 'U' joints, or universal joints, are flexible couplings that connect the driveshafts to the axles and transmission, enabling the transmission of torque while accommodating changes in angle and movement between the connected parts. Together, these components play a crucial role in the drivetrain's functionality, ensuring smooth power delivery and vehicle maneuverability.