I have same quoestion before, just loose your differential and it will be OK.
Also, what motor are you using, this car is better with lower speed one...
I try BL 35A + 9T at first but too fast and not able to control, always spin around even accelerate in stright line, not even able to pull to 3/4 throttle.....
Then change to Team Power Fan black pig + TP ESC, control is more easy and speed is good enough in football court, 4600mah Ni-MH can play 20-30 minutes. OK la !
But changing motor is very difficult, almost need to dissamble the whole rear block !!