[dtengineering]

Although I haven't used the AM shifters, everything else from Andymark has been great.

But I encourage you to think about WHY you want a two speed tranny. Firstly, as has already been stated, you don't know what the game will be... last year a two-speed transmission was completely useless (weight and complexity actually made them worse than useless) due to the surface of the playing field, even though it was completely legal. Fancy wheels, however, were illegal... so teams that purchased omnis and mecanums in advance with plans to use them in the game were out of luck.

Secondly, even if the game is well suited to a two-speed transmission... are you going to be able to take advantage of it? You'll find several discussions on CD about two speed trannies, but unless you've got either an exceptionally skilled driver or some good auto-shifting software, there is a good chance you are not going to be able to maximize the benefits it has to offer. In fact, if you get stuck in high gear, or in the heat of competition the driver forgets to shift gears... having a two speed gearbox might not be a great advantage.

On the other hand, good on you for doing your research now... if you're getting them to experiment and aren't worried whether you use them in the game or not, then definitely consider getting an AM tranny. Just don't assume you'll be able to use it in the competition.

Jason