I agree with Jay TenBrink. 2 speed is always nice because you have speed and the power at the same time. you can have speed and torque with one speed transmission, but you can have more advantage from a 2 speed transmission. Is shifting necessary? not really, it really depends on the game, shift in fly is nice to have since you dont waste time to stop, shift and then go. for example, 2003 Stack Attack, a lot of teams have used 2 speed transmission in order to have speed and torque at the same time. some team went with 1 speed... like Baxter Bomb Squad, they were really fast and reliable. so what i say is, it really depends on the game.
