Cars Tamiya Cc-01 Not Working

Hi! I'm having a problem with my first non rtr modell, tamiya cc01. I built it 6 hours ago, but its not working properly. If i pull a Full throttle on the transmitter , the modell starts revving, but if i press the throttle slowly, it starts moving, but i hear grinding noise i checked the gears, but they are fine. Please help, there is a video about what my problem is!
 

Tony

Staff member
To me is sounds like the pinion is slipping on the motor shaft. When you turned it upside down though, there is definitely a mesh problem somewhere.
 
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