Front right wheel not moving

[T2slsx]

After playing with truck today I noticed one wheel was moving forward when I pushed the throttle, I removed wheel to inspect the damage could not see anything fiscally wrong, when I turn it manually it moves and the left moves also... Please help the newbe

 

[Rolex]

There are a few possibilities. Remove the wheel and make sure the hex isn't stripped in the center of the hub. Make sure the pin is still in. Check all the recessed Allen screws at the axle ends. Not really screws, but more like pins with a grub screw head. If one has sheared, you will not get power to that wheel. Turning by hand will give you enough friction to move the diff, but under load it will slip.

 

[T2slsx]

Thanks that sounds about right