An assembly for multi-stage damping comprising: a damping unit including a wall defining an inner surface and an outer surface extending about an axis between a base portion and a top portion; a partition spaced between said base portion and said top portion and extending from said inner surface of said wall defining a first chamber between said partition and said top portion and a second chamber between said partition and said base portion, said partition having an internal holding wall defining a holding chamber; a decoupler is disposed within said holding chamber and has a radius extending between a center point and an outer ring, said outer ring engaging said internal holding wall, said decoupler having a first surface opposite a second surface for preventing fluid transfer between said chambers (30, 32); said decoupler defining a circular zone extending about said center point for flexing between said chambers (30, 32); and said decoupler defining an annular zone surrounding said circular zone extending inwardly from said outer ring to define a ring shape, said annular zone is configured to flex with said circular zone in a first mode to maximize the potential volume of displacement and said annular zone is configured to flex independently of said circular zone in a second mode to decrease the potential volume of displacement of said decoupler between said first chamber and said second chamber, wherein said decoupler includes an interior ring spaced between said outer ring and said circular zone and said interior ring extends annularly about said center point and extends axially from said first surface and extends axially from said second surface, wherein said outer ring extends axially from said first surface and extends axially from said second surface a greater axial distance than said interior ring extends axially for spacing said partition from said interior ring to define an axial travel limit of said interior ring, characterized in that the assembly includes a retainer having an annular shape for securing said decoupler in said holding chamber wherein said retainer includes a plurality of arms extending towards said axis terminating at and extending along said interior ring to define an axial travel limit of said interior ring of said annular zone along said axis towards said second chamber. a damping unit including a wall defining an inner surface and an outer surface extending about an axis between a base portion and a top portion; a partition spaced between said base portion and said top portion and extending from said inner surface of said wall defining a first chamber between said partition and said top portion and a second chamber between said partition and said base portion, said partition having an internal holding wall defining a holding chamber; a decoupler is disposed within said holding chamber and has a radius extending between a center point and an outer ring, said outer ring engaging said internal holding wall, said decoupler having a first surface opposite a second surface for preventing fluid transfer between said chambers (30, 32); said decoupler defining a circular zone extending about said center point for flexing between said chambers (30, 32); and said decoupler defining an annular zone surrounding said circular zone extending inwardly from said outer ring to define a ring shape, said annular zone is configured to flex with said circular zone in a first mode to maximize the potential volume of displacement and said annular zone is configured to flex independently of said circular zone in a second mode to decrease the potential volume of displacement of said decoupler between said first chamber and said second chamber, wherein said decoupler includes an interior ring spaced between said outer ring and said circular zone and said interior ring extends annularly about said center point and extends axially from said first surface and extends axially from said second surface, wherein said outer ring extends axially from said first surface and extends axially from said second surface a greater axial distance than said interior ring extends axially for spacing said partition from said interior ring to define an axial travel limit of said interior ring, characterized in that the assembly includes a retainer having an annular shape for securing said decoupler in said holding chamber wherein said retainer includes a plurality of arms extending towards said axis terminating at and extending along said interior ring to define an axial travel limit of said interior ring of said annular zone along said axis towards said second chamber.