Foam lined propshaft

A vehicle comprising:

• a axle assembly having a differential, the differential including an input pinion gear and a ring gear, the input pinion gear meshing with the ring gear to produce a hypoid gear mesh vibration;
• and
• a propshaft assembly having a shaft structure and a pair of insert members, the shaft structure having a hollow cavity with a longitudinal axis, the shaft structure vibrating in response to the receipt of the hypoid gear mesh vibration such that when the hypoid gear mesh vibration is at a predetermined frequency, a pair of second bending mode anti-nodes are generated in a spaced relation to one another along the longitudinal axis, each insert member being disposed within the hollow cavity and engaging the shaft structure, each insert member being located at a position that approximately corresponds to an associated one of the anti-nodes and having a density that is tailored to an anticipated displacement of the associated one of the anti-nodes to thereby attenuate vibration of the shaft structure, wherein each of the insert members has a density, a mass and a resilience and a first one of the insert members is formed such that at least one of its density, mass and resilience is different from that of the other one of the insert members.