A vehicle transmission includes a plurality of driven gears comprising a
series of concentrically spaced ring gears. Each ring gear of the
plurality of driven ring gears has an inner diametrical surface and an
outer diametrical surface. Each outer diametrical surface is configured
to slidingly engage the inner diametrical surface of an adjacent ring
gear. The vehicle transmission further includes a biasing means for
biasing each ring gear away from a driven shaft and a selective
engagement means for selectively engaging one ring gear of the plurality
of ring gears with the driven shaft.