I have a Nikko 6WD Bulldog (the electronics might be the same as for the Mammoth and Razer I suppose) and it suddenly developed an error: when running forward it only activates one side of the wheels and therefore it turns around constantly. Reverse is ok, all wheels are spinning when in reverse.

The winch is running in both directions. But when it is activated with the forward direction it doesn´t work if the steering is turned at the same time.

I checked the motors: both get 3,7 V when in reverse, but only one gets it when in forward.

Any ideas?

Greetings from Austria
Rocco