I would go with either a two speed or three. Our team has used two speed gearboxes the past several years with great success. We have high speed for getting out on the field quickly and low speed for pushing, pulling, or climbing. The addition of a third speed wouldn't be bad for reasons mentioned above but in our experience really hasn't been needed since this year we mated the Bosch and CIM motors together with the gearbox and have more than enough torque. Of course it's really cool to see the six speed shown in the other thread. Heck, why stop at six when you could design a
sixteen speed gearbox?
Now wouldn't that be something to see!
Oh yeah, we've also discovered on our team that the more ranges we add to our drivetrain, the more chance we have of seeing if it would pass the "Elgin Test" or not.
