[tuXguy15]

The gearbox is mechanical but is shifted pneumatically via programming. We have used it this year. I highly recommend that you use 2 cims per gearbox for the speed and torque. 2 cims is okay but will draw a lot of current. Our gear ratio that we had was High speed was 24:1 and low speed was 6:1. It was easy to program them in java for my team. I also do encourage you to have a button that kills robot driving when you are shifting then drive or else you are throwing a piece of metal into spinning gears with a lot of power. It is not needed but recommended because of it leading to possible shifting problems in the future of its usage.