Vehicle transmissions equipped with eddy current retarders, and in fastener members for such transmissions

A vehicle transmission, including a gearbox which can be coupled to an internal combustion engine and which has a housing and an outlet shaft, and an eddy current retarder which is equipped with a stator and a rotor, the stator being fastened to the gearbox housing by fastener means including at least one fastener member, and the rotor being connected to the gearbox outlet shaft, one of the stator and the rotor including a ring of electromagnetic poles centered on the gearbox outlet shaft and the other including at least one annular element of magnetic material which is also centered on the gearbox outlet shaft, the poles and the annular element being separated by an air gap of small width, wherein the fastener member includes two rigid parts fastened rigidly respectively to the stator of the retarder and to the gearbox housing, each of these two parts including a bearing surface which corresponds to at least part of a surface of revolution centered about the gearbox outlet shaft, the two bearing surfaces being arranged opposite one another and being separated by a layer of an elastomeric material, this layer of elastomeric material being bonded to the two bearing surfaces to allow a certain amount of angular deflection of the two rigid parts relative to one another in rotation about the gearbox outlet shaft, the two rigid parts being substantially unmovable relative to one another in a direction parallel to the width of the air gap.