A universal joint is an important component used in the transmission system of vehicles.
Its main utility is to connect two shafts that are not in a straight line but need to transmit rotary motion.
In a vehicle, the universal joint connects the propeller shaft to the gearbox and the differential.
Because the axle moves up and down with the suspension, the universal joint allows the propeller shaft to transmit power even when its angle changes.
This flexibility makes smooth power transmission possible when the vehicle drives over uneven surfaces.
Without a universal joint, the shafts would bind or break when the suspension moves.
Therefore, the universal joint is essential for reliable and flexible power delivery in the driveline.