somewhat bullet proof jato tranny....

[Unsullied_Spy]

I believe they are 32p gears.

A few reasons why 2 speeds don't work well with electrics:

1) BL motors work best with a certain amount of load on them, this varies between motors and setups but you ideally want to find the sweet spot and run it there. If your 1st gear is the gear where it is setup ideally and it only kicks into 2nd when you nearly max it out in 1st I suppose it would be good for a speed gear, but there are a few other issues.

2) A 2 speed will not reduce amp draw, it could actually make it worse. Amp draw of a BL motor is proportional to the load placed on it, when you shift into 2nd there is suddenly a lot more load on it and nothing to absorb the shock (part of reason #3) and the amp draw spikes because the RPM at the input shaft (being driven by your motor) suddenly drops but the ESC is still working the motor at the speed of 1st. The ESC can compensate for this quickly, but the increase in gearing will still require more amps to provide the power needed to get moving.

3) Drivetrain shock. Unless your slipper clutch is adjusted so loose that it slips quite a bit unless you're very gentle on the throttle as soon as it kicks into 2nd gear the sudden RPM change WILL tear things up. Think 2 speed clutches, one-way bearings, output yokes, U-Joints, stub axles, and tranny gears (possibly spur gear if your mesh is too loose).

4) When it shifts into second you will either spin the tires or wheelie, depending on how much traction you get (some nitros experience this same condition when shifting into second). Either way it is very possible you will lose control. This happens because when more load is placed on a BL motor the power output actually goes up unless you can't supply enough amps to feed the motor (in which case things start getting hot, fast). The sudden increase in power and RPM change causes your control problems.

That's about the best I can put into words, but I really think you're best off going with a properly setup single speed.