I bought a 6 year old, very slightly used e revo from a friend. MMM system. Both the ESC and motor are brand new via replacement from Castle. With brand new 3s lipos and 18/54 gearing I'm struggling to hit 45 mph. Did the torque test with castle and the kv on the motor is fine. No transmission issues as there's plenty of torque and without the pinion engaged it rolls smooth.