I was riding my Emaxx today and it seemed to be pressing "brakes" every time i let go of throttle. Its not the throttle trim for sure. I tested to find out what the problem is. It was not the center diff since it spun freely when i took off both ends. And it was not the rear or front gearbox. When i tested the Motor not connected to anything, it was super hard to spin without the pinion. I have the castle 1515-2200kv motor on the e-maxx. What can be the problem? I took the cover off the motor and it seems to have a burnt smell. Is there any way to lubricate the motor and fix the problem? I dont want to spend another 180 for the motor.