An axle assembly comprising: an axle housing having a center portion that defines a bowl opening and a differential carrier opening that receives a differential that has a ring gear; and a bowl cover that is mounted to the axle housing, the bowl cover including: a perimeter surface that is radially disposed about a center axis and extends around the bowl cover; a flange that extends from the perimeter surface, wherein the flange facilitates mounting of the bowl cover to the axle housing; a bowl that extends from the flange and covers the bowl opening; and characterised by the bowl being configured as a substantially spherical cap and the bowl cover further including: a lubricant reservoir that is disposed proximate the flange and that extends away from the axle housing, wherein the lubricant reservoir holds a volume of lubricant outside the sump portion located near the bottom of the center portion of the axle housing; and wherein the lubricant reservoir is at least partially defined by the bowl, a first lubricant reservoir wall that is disposed proximate the flange and extends from the bowl, and a second lubricant reservoir wall that extends from an end of the first lubricant reservoir wall away from the axle housing and to the bowl. an axle housing having a center portion that defines a bowl opening and a differential carrier opening that receives a differential that has a ring gear; and a bowl cover that is mounted to the axle housing, the bowl cover including: a perimeter surface that is radially disposed about a center axis and extends around the bowl cover; a flange that extends from the perimeter surface, wherein the flange facilitates mounting of the bowl cover to the axle housing; a bowl that extends from the flange and covers the bowl opening; and characterised by the bowl being configured as a substantially spherical cap and the bowl cover further including: a lubricant reservoir that is disposed proximate the flange and that extends away from the axle housing, wherein the lubricant reservoir holds a volume of lubricant outside the sump portion located near the bottom of the center portion of the axle housing; and wherein the lubricant reservoir is at least partially defined by the bowl, a first lubricant reservoir wall that is disposed proximate the flange and extends from the bowl, and a second lubricant reservoir wall that extends from an end of the first lubricant reservoir wall away from the axle housing and to the bowl. a perimeter surface that is radially disposed about a center axis and extends around the bowl cover; a flange that extends from the perimeter surface, wherein the flange facilitates mounting of the bowl cover to the axle housing; a bowl that extends from the flange and covers the bowl opening; and characterised by the bowl being configured as a substantially spherical cap and the bowl cover further including: a lubricant reservoir that is disposed proximate the flange and that extends away from the axle housing, wherein the lubricant reservoir holds a volume of lubricant outside the sump portion located near the bottom of the center portion of the axle housing; and wherein the lubricant reservoir is at least partially defined by the bowl, a first lubricant reservoir wall that is disposed proximate the flange and extends from the bowl, and a second lubricant reservoir wall that extends from an end of the first lubricant reservoir wall away from the axle housing and to the bowl. a lubricant reservoir that is disposed proximate the flange and that extends away from the axle housing, wherein the lubricant reservoir holds a volume of lubricant outside the sump portion located near the bottom of the center portion of the axle housing; and wherein the lubricant reservoir is at least partially defined by the bowl, a first lubricant reservoir wall that is disposed proximate the flange and extends from the bowl, and a second lubricant reservoir wall that extends from an end of the first lubricant reservoir wall away from the axle housing and to the bowl.