A method for structuring a gear assembly housing may include: identifying the lowest surface structure of ring gear teeth top lands; forming a lower gear housing portion having a wall positioned below a gear assembly centerline; shaping the wall relative to an axis of an axle to form: a convex curved wall segment adjacent the lowest surface structure joined to a first concave curved wall segment that is joined to a generally linear wall segment; a first transition wall segment that is joined to the generally linear wall segment; a ring gear wall segment of generally linear form joined to the convex curved wall segment; the ring gear wall segment joined to a second concave curved wall segment that transitions to a second transition wall segment; and attaching an upper housing portion.