yea basicly as said above ... the 1st gear is on a oneway bearing . the second gear has basicly a clutch sord of like the use in the engine(not exsactly but its the same princital). as the car speeds up the 2nd gear engages becouse of the centrital force pushes the shoes out. sence the 2nd gear is going faster then the 1st the first gear no longer contributes power to the car becouse its on a oneway bearing