What is "giubo"

A Giubo ( ; etymology: Giunti Boschi), also known as a flex disc, and sometimes misspelled as guibo, is a flexible coupling used to transmit rotational torque between the drive shaft and the companion flange on mechanical devices, such as an automobile engine.

The giubo is made from flexible synthetic rubber and is designed to allow some angular misalignment while reducing driveline vibration in mechanical power transmission applications.