A joint assembly includes a first shaft having an end, a second shaft having an end, a first inner ring coupled to the first shaft, and a second inner ring coupled to the second shaft. The assembly further includes a sleeve coupled to the first and second inner rings, the first and second inner rings disposed within the sleeve, and a centering device engaging the ends of the first and second shaft. The centering device is configured to maintain the angular positions of the first and second shafts relative to one another, and the centering device is substantially fixed from rotation during rotation of the first and second shafts.