An isolator assembly includes an elastomeric assembly which is disposed within a socket defined by a supporting structure. The socket defines a transition portion, a retention rib and a stopping rib. The elastomeric assembly is positioned in the socket by sliding the elastomeric assembly through the transition portion so that the elastomeric assembly is compressed as it moves into the retention rib. The stopping rib engages an end surface of the elastomeric assembly once it has been properly positioned in the socket.