Abstract: In an arrangement for retaining an outer collar (13) of a compliance bush assembly, an internal bore of a corresponding retaining collar (9) which may be welded to a front end of a trailing arm (2, 3) is provided with an increased diameter portion (20) defining an annular step (21) adjacent to a leading axial end thereof at the time of the press fitting process. When the outer collar is press fitted into the internal bore of the retaining collar, the part of the outer collar facing the increased diameter portion is allowed to bulge out as a result of creep deformation. Thus, even when the outer collar undergoes a creep deformation, and this causes the pressure acting between the outer collar and retaining collar to diminish, the part of the outer collar facing the increased diameter section that has bulged out prevents the outer collar from shifting or dislodging from the retaining collar.