Originally Posted by CraigMBA

I have a very low speed cogging problem with two different Tamiya shaft drive cars, and two different Thunderpower motors, with two different Justock controllers, If you remove the pinion, the motor is smooth, but unless you nail it from a dead stop, the cogging makes so much noise it sounds like you've trashed a spur. If you nail the throttle, it will drive through it, but this can't be good on the equipment.

Once it starts moving, or if you give it the slightest push, it never does it again.

I speculate this is because the FDR is so high (between 3.2-3.8) the speed control doesn't see the rotor turning and misfires. Any suggestions on how to remedy this?