A retaining ring retention system, comprising: a retaining ring provided with lugs (34,35) including an installed position and an installing position, wherein: a distance between the lugs (34,35) is greater when in the installing position than in the installed position; when the lugs (34,35) are in the installed position: the retaining ring is rotated relative to when in the expanded installing position; the retaining ring is configured to be located in a groove of a rotatable shaft and rotatable with the rotatable shaft; a retained member that is configured to be secured to the rotatable shaft by the retaining ring, wherein the retained member: defines an opening sized to receive the rotatable shaft so that the retained member is rotatable with the rotatable shaft; characterized in that the retained member is provided with a semi-circular retention lip that: circumscribes the lugs (34,35) when in the installed position to prevent the lugs (34,35) from being forced apart by centrifugal force such that the retaining ring may disassociate from the groove; and includes a cutout portion, which separates first and second ends (46,47) of the retention lip and accommodates the lugs (34,35) when in the installing position. a distance between the lugs (34,35) is greater when in the installing position than in the installed position; when the lugs (34,35) are in the installed position: the retaining ring is rotated relative to when in the expanded installing position; the retaining ring is configured to be located in a groove of a rotatable shaft and rotatable with the rotatable shaft; the retaining ring is rotated relative to when in the expanded installing position; the retaining ring is configured to be located in a groove of a rotatable shaft and rotatable with the rotatable shaft; a retained member that is configured to be secured to the rotatable shaft by the retaining ring, wherein the retained member: defines an opening sized to receive the rotatable shaft so that the retained member is rotatable with the rotatable shaft; characterized in that the retained member is provided with a semi-circular retention lip that: circumscribes the lugs (34,35) when in the installed position to prevent the lugs (34,35) from being forced apart by centrifugal force such that the retaining ring may disassociate from the groove; and includes a cutout portion, which separates first and second ends (46,47) of the retention lip and accommodates the lugs (34,35) when in the installing position. defines an opening sized to receive the rotatable shaft so that the retained member is rotatable with the rotatable shaft; characterized in that the retained member is provided with a semi-circular retention lip that: circumscribes the lugs (34,35) when in the installed position to prevent the lugs (34,35) from being forced apart by centrifugal force such that the retaining ring may disassociate from the groove; and includes a cutout portion, which separates first and second ends (46,47) of the retention lip and accommodates the lugs (34,35) when in the installing position. circumscribes the lugs (34,35) when in the installed position to prevent the lugs (34,35) from being forced apart by centrifugal force such that the retaining ring may disassociate from the groove; and includes a cutout portion, which separates first and second ends (46,47) of the retention lip and accommodates the lugs (34,35) when in the installing position.