A method for manufacturing an axle is provided. The dash panel is placed in the front part of the cabin, extending in the width direction of an automobile, and forms a tire house bulged inward of the cabin at both left and right lower sides. The leavening system at least partially proofs the dough after insertion into and closing of the package, such that the dough expands to a volume substantially equal to the volume of the package and has a high raw specific volume. The seesawing mount is furnished in the opening with a first end and a second end.