A standard universal joint cannot run over 8° without causing significant vibration, effecting either the handling and ride of the car to actual damage to the vehicle. All driveshafts have to be balanced to take into account this movement of 8°, otherwise damage to gearbox, the axle and its bearings will occur.
The number of moving parts means anything happens to one component will mean a failure of the whole part
Constantly being re lubricated and covered in a protective parts is required otherwise water, dirt and debris will mean premature wear and failure
Twin Spring offers one solution to both products, a set of counter wound springs means zero moving parts and being lubricated and encased in vulcanised neoprene means no water, dust or debris can enter the joint to cause failure