Brother, looks like I have the same problem with my stock Lunch Box and it happened after I run up and down the hill a few times. So eventually changing the ESC or a motor fixed it?
Hi, is tpm8r the ESC, but I just checked it is using a TEU-101BK. Do you suggest I should replace the ESC(with what model?) or try a new motor('black skin pig' is my next choice?
I have the same problem before; after open up the rear axis, I found that the motor gear nut was loosen. Once that nut is tight, I start rock n roll again! Let's have a closer look at it.