High Quality Content by WIKIPEDIA articles! A rag joint refers to certain flexible joints found on automobiles. They are typically found on steering shafts that connect the steering wheel to the steering gear input shaft, usually at the steering gear end. They provide a small amount of flex for a steering shaft within a few degrees of the same plane as the steering gear input shaft. It also provides some damping of vibration coming from the steering system, providing some isolation for the steering wheel. This type of joint was also used on drive shafts of 1960s race cars, later being replaced by the constant-velocity joint or driveshafts with pairs of universal joint.