I wanted to test my car before bringing it to a race.. and after my first try (1 minute), I heard that kind of sound which informs you that you should immediately stop the car. I removed the body shell and.. result = one spur gear dead ! well, maybe I didn't screw enough tightly the motor on the motor plate
(I forgot to explain that I can't use directly a spur gear with my car, I need to adapt it to the differential size)
I tried with an other spur gear and I made sure the screws were correcty tighten ! but.. it was not enough !! The same sound.. but I noticed at this moment the real problem ! The motor plate was not enough strong .. it bent
See below
