Big Problem
 

i was just playing around on my track in the backyard with my sp, and then the car would no longer move. though the servo still is controllable. the receiver is not at fault because i tried the receiver on my 1/10 car. i have an ipd race-20. please help.

Does the motor move when connected to a single cell?

well, when i the car and radio are on, the speedo will detect the radio and the led will turn off, but it doesnt. well, i just tried my other motor and still the speedo doesnt work.