[brainanator]

I've never examined an RC shifting transmission, but is there any slippage? I ask because you're going to get up to 90mph @ 30k rpm, and then it shifts right?...... So then you have that huge mass of a motor spinning at 30k, and now it's way too fast for the speed it's traveling, seems to me like you're going to either break something or spin out the wheels instantly.