Systems and methods for stabilizing the ring gear in a Powerglide transmission are disclosed. Systems may include a radial stabilization member mountable to the planet carrier and individual bearing members mountable to an inner surface of the ring gear in opposition to the radial stabilization member. Axial stabilization may also be provided by an axial stabilization member configured and dimensioned to be positioned between the ring gear mid-step and reverse clutch pack apply plate. Methods include mounting the radial stabilization member on the planet carrier using attachment means and securing the bearing members to the inner surface of the ring gear in a spaced relationship.